A currency needs to have a fairly constant value, goods/services priced in currency, and payment accepted in same. No crypto meets that definition.
I'll say the same thing another way: if miners or other crypto enthusiasts thought for a microsecond they could not convert crypto to actual bonafide currency the whole thing would dry up within a month. Because crypto people are hyper focused on getting real cash!
If you're a bank do you wanna really accept crypto as a deposit then pay interest in real currency?
I seriously dislike crypto ... but one would be on safer grounds calling crypto a risky investment or something vaguely asset like ... but not cash.
The most common way this exchange is implemented via some entity that has both cash and crypto. You give them crypto and they send you cash, this doesn’t have much to do with banks except this sending of cash mostly happens via a bank system
A few "stablecoins" can be used to make deposits with a high interest rate. The assets that back up this interest come from ... ¿thin air? So they collapse sooner or later.
I think there are a few full backed stablecoins without shenanigans, but they are not so popular because you don't get a high interest "without risks".
I'll say the same thing another way: if miners or other crypto enthusiasts thought for a microsecond they could not convert crypto to actual bonafide currency the whole thing would dry up within a month. Because crypto people are hyper focused on getting real cash!
If you're a bank do you wanna really accept crypto as a deposit then pay interest in real currency?
I seriously dislike crypto ... but one would be on safer grounds calling crypto a risky investment or something vaguely asset like ... but not cash.