BND
Vanguard Total Bond Market
stock NASDAQ ETF

Not at all! You are super young by investing standards anyway. Even when you’re 70, most of your investments will still be in VTI and VXUS because you have up to 30 years left to consider.
The big difference is that as you age and approach retirement, you will add more of a third component to the mix called bonds. Those are lower return, lower risk assets. VTI, VXUS, and BND comprise what is called the 3 Fund Portfolio. BND is the component that increases over time. It’s normal to have as little as 0% BND when you’re still 10+ years from retiring and then build up that portion to 30%-40% of your portfolio by the time you’re retired.
Just remember that VTI and VXUS are long-term investments whose performance meant to be measured in decades rather than month or years. As a 40-ish year old, I hope you have many such decades to watch that growth!

No broker needed, can buy them at Vanguard or Fidelity in the Treasury auction each month. Most folks just buy the ETF BND or BIV and have them send the dividends.

If that’s how you need in liquidity to feel comfortable, fair enough, but keep in mind that keeping too much is cash or ultra short bonds may be harmful in the long run as they don’t appreciate as much. So long as you don’t keep on adding beyond about a 6 month expenditure range, it’s more then reasonable, after that, reconsider if you should instead put it into higher growth assets.
Your stocks choice is unusual. VWCE and SPPW seem to cover much of the same index area, and though SPPW doesn’t cover Emerging Markets, IS3N certainly does. This seems to be some strange overlap, and I’m not sure if it’s worth picking all three rather then just simplifying it with more FTSE All-World. This will cover Large and Mid-Caps in both developed and emerging markets, which if you then want some Small Cap exposure the IUSN will cover that.
So it seems to make sense to just simplifying to VWCE and IUSN, with a heavy, HEAVY weight towards VWCE. Keep in mind that by doing this you will miss out on Small-Cap Emerging Markets, however they are extremely volatile, and to be frank they haven't performed so well in the last few years… of the ones before that. You may consider adding some further area diversification with bonds like BND to further manage volatility in this area.
Even still this is an odd combination of investments, and you may consider talking to a Financial Advisor about future investments. We Redditeers should probably not determine your future wealth.

BND is a blend of about 50% different length governemt treasuries as well as ~25% corporate and ~25% securitized bonds. Basically, BND is a bond blend. SGOV, however, is strictly short term government T-Bills. While the NAV price of BND can fluctuate and drop based on the interest rate, SGOV's value doesn't drop as it's 100% short-term treasuries (T-Bills).
If you look at the value of SGOV since inception, it's basically always been $100/share. It slightly climbs until ex-dividend date when the divided is issued and the fund price drops by the dividend amount (like every dividend find or stock works). It's just more obvious as there's basically zero volitility with short-term government bills. A fund like BND has volitility, so the stock price and rise or fall based on interest rates and market conditions (it's been from $68-90/share). This volitility makes it not as obvious when dividends are paid, but it works exactly the same (and the same with every dividend paying instrument).

Be wary of all the Crypto suggestions here. The inherent volatility of crypto makes it more akin to speculation and gambling than true investment. Considering you’re likely investing for retirement, you should try to avoid this. Whilst they could give relatively good returns, they are also fairly likely to run you down to zero.
Stick almost entirely with Index Funds. As you are lastly you, you should start of with mostly Stocks as the heavy majority of your portfolio, with some stocks to try and manage volatility and give some potential fixed income. As you get older, alter the stock to bond ratio towards bonds, but keep mind you still want majority stocks for the vast majority of your life.
The S&P 500 is the big one here. Your portfolio should be majority this, and though reasonable minds may differ, about 70% should be appropriate. About 15% in some International or World ex-USA ETF to add some diversification away from the USA and reduce some of the volatility, and then the final 15% in some Bonds ETF, like BND. Keep in mind this is just representative, and can vary in not on percentages but also in area of indexes. Some people may prefer to invest in Small or Mid Caps as well, or REiTS, or even Gold etc. Look into it further if you want to further your diversification.

So something like BND would have all of these Treasuries, but the interest on that accrues monthly and the interest on SGOV accrues daily which is why the NAV chart is a sawtooth wave — correct?

What’s more important to you? Dividends or Growth? With ETF’s, I don’t see a point in adding multiple overlapping ETF’s in a pie. I’d only add ETF’s that are drastically different.
For instance, I have a pie that is SCHD, BND, and FBTC. I’m primarily a dividend investor. All 3 of these funds are VERY different from each other.
VOO and VTI are practically the same ETF, so it makes no sense to have them both.

You might reconsider BND if you're young(ish). BND is more for capital preservation. Not financial advice. 😋

That's not the actual return of BND. [https://investor.vanguard.com/investment-products/etfs/profile/bnd](https://investor.vanguard.com/investment-products/etfs/profile/bnd)
That commenter is a whacko who hates all vanguard funds, you can just ignore him

BND is a bond index, returns come in the form of interest payments not price increases. If you look at the total returns BND has performed fine. The reason BND’s price collapsed in recent years is because interest rates went way up.

I looked up BND and it has done nothing but drop in the last 5 years. What’s the deal with that?

I once did a rollover IRA in Fidelity, and not sure about what to do with back then, let them professionally manage the account for about 2 years. When I learned more, I checked its performance and it was almost identical to a 70% VT 30% BND portfolio with no additional contributions. It had 28 separate funds, and around .8% management fees, and I had made several after tax contributions. The fees ate up the contributions. There was no secret sauce that improved returns.
Good news was I did it for just two years, and it wasn't a bad return. Bad news was I could have had better performance with my own self managed account. However at the time I had no idea what I wanted to do with it so at least it didn't do anything terrible with my funds.
I agree with comments below to not rush into anything. Put it into a money market fund for a few months, and educate yourself.

Classic 70/20/10 of VTI/VXUS/BND is broad coverage, relatively low risk and will give you good returns. It really depends on what other savings you have, when you want to retire and how risk averse you are.

Up to you. If you are young, BND isnt necessary, but it rly depends on your risk tolerance. Excluding BND, I personally do 80% VTI and 20% VXUS. Some ppl suggest more exposure to the rest of the world, like 30% though.

No. Just do VTI/VXUS/BND.

Not horrible advice. But I would never put a large sum of money in BND if I need it at 5 years. I’d keep that in a money market account or short term treasuries like sgov or vbil.
BND could certainly lose value at a 5 year period. And I think at 5 years the difference in BND vs sgov would almost never be with the risk.

Dump the advisors. Somehow all their best advice happens to be what also gets them more commissions and fees.
For a long term horizon (10+ years), put it all in VT.
If you will need money in 5 years (like buying a house), but it in BND.
For money you need in less than 5 years, plus an emergency fund, put it in an money market or high yield savings account.

I made the switch to VT, VXUS around the time trumpet took office and I'm currently hitting 10% gains YTD. Not sure if that will continue, but it's working for me after transitioning from 75% VTI and the rest in BND and other funds.

You're definitely not behind, lots of self-employed people figure this stuff out later and you're actually ahead of most just by asking the right questions!
So the 2 vs 3 fund portfolio thing is what you PUT inside your Roth IRA, not separate from it. Think of your Roth as like a bucket, and the $7k limit is how much you can put in that bucket each year. Then once the money's in there, you gotta decide what to actually buy with it - thats where VTI, S&P 500 ETFs, etc come in.
For the 2-fund approach, most people do something like:
\- 70-80% total stock market (VTI is solid)
\- 20-30% bonds or international (VXUS for international)
3-fund is usually:
\- US stocks (VTI)
\- International stocks (VXUS)
\- Bonds (BND)
Honestly since you're just starting out, you could keep it super simple with just VTI for now. Its basically the entire US stock market in one ETF. You can always get fancier later but the key is just getting that money working for you instead of sitting in the savings account.

There is, and that's why they are so hard to argue against when irrational "income investors" get super deep into them. It's a behavioral dopamine hit.
We, rational investors, need to admit that for some people the idea of a variable cashflow from a portfolio that doesn't require them selling assets (because they are afraid they may do it wrong or at a "bad time") has some emotional value. Good portfolio construction can help with this... it's not a "pure Bogleheads" approach and I am not saying it's optional or that anyone here should do this, but if someone is retiring and they want a "I never want to sell assets" portfolio and willing to live with variable income, a Rick Ferri Core 4 style portfolio may work better than a Three Fund Portfolio:
[https://portfoliocharts.com/portfolios/core-four-portfolio/](https://portfoliocharts.com/portfolios/core-four-portfolio/)
Bump up the REITs, tweak the bonds and up them to 40% of portfolio and that could be a reasonable "income" portfolio for a retired person. Something like:
50% VT
10% VNQ
30% BND
10% VTIP
Is that "better" than a forever VT+BND style portfolio? Well, that's in the eye of the beholder. If someone has a large enough retirement portfolio, and they really place value on the feeling of a quarterly "interest payment", then that's still better than not investing at all.