This is not looking at the whole picture. The key is, you do not allow your BTC usage to comingle with your real identity. This means you both buy and sell stuf

This is not looking at the whole picture. The key is, you do not allow your BTC usage to comingle with your real identity. This means you both buy and sell stuff solely with BTC. If you want to buy stuff in the "real world" then you can trade some for Monero or maybe ZCash, and then convert to USD. (Optionally mix it further in other ways..) BTC is really "psuedoanonymous" because while you can certainly trace my transactions if you know a wallet address, you still have no idea who or where I am as long as I do not reveal that wallet to be connected to any "real world" identity. This is still not easy though. For example, if you're serious then you must only transmit transactions within Tor, otherwise the originating IP may single you out. Ideally you should use different wallets for each transactions, and only pool them together after they have each been converted to XMR or similar. There's lots of gotchas but frankly it's a decent system.