Because nobody can rob your 15 milllion from the bank. But from your wallet, it is very easy to rob...
Well I disagree. In fact, I agree but let me explain

I was talking about the chance of being kidnapped which, for me, is equivalent. I mean, a thief entering your house could kidnap you and request that you send a remittance or that you withdraw money and give them ransom in cash.
In any case, being kidnapped must be a terrible situation, so for me, it doesn't matter what the reason is (crypto or bank), but the situation itself.