> You (most probably) did have to go (physically) to a bank and prove your identity and your credit record in order to maintain any credit card.

Didn't have to go there physically. And this is done once while with crypto exchanges you need to sign up for multiple ones because the quality and coins they offer vary so much.

> And it takes days to wire money to your bank account.

In the UK I can transfer money through my phone app (or online banking if I prefer) to any other UK bank account and the transfer is instant and completely free. Cryptocurrencies can't compete with banks that have their shit together when it comes to convenience.