It can be totally anonymous if you can use a non-KYC exchange way of acquiring it. And then again, you can buy monero or zcash, then buy bitcoin again. I could start up a new open source wallet on an air gapped machine, go to a local bitcoin meetup, and buy bitcoin for cash.
Yes, and a motivated man with a heavy wrench could take it too. That doesn't mean that permissionless currency isn't valuable. It just means that my threats have been reduced from nanny took my money and man with wrench to just man with wrench.
Really? Most crypto is not anonymous, it is at best pseudonymous. If a big enough government agency wants your crypto, they will get it.