For all the things people want the. To do, the most important one to me is the "not your keys, not your coin".
I don't trust banks as neither. One time a bank i use to get paid decided to "block" my accounts for 'suspicious avtivity" (i made a transfer to an account number they deemed high-risk). I ended up having to go to a specific physical branch, and literally BEG the clerk to activate the account where they had MY FREAKING MONEY.
I've learned since that, once you give it (lend it actually) to banks, it is not your money.
Internet anonymity might be a temporary defence, until AI doxing analysis improves or one's government decides to change their rules (good luck securing against that).
I don't have any crypto: firstly because I lack the opsec skills. Also because I travel to other countries, and the best defense is to actually not have anything worth being stolen (or limited financial exposure e.g. my physical wallet was stolen last time I was in Brazil).
People immensely more skilled than I will ever be, still have security failures (e.g. Troy Hunt fell for a phishing attack recently).
Great article on how the US does that: https://www.bitsaboutmoney.com/archive/debanking-and-debunki...