Agreed . cryptos nowadays is still questionable for most countries and most of them arent still supporting the use of it . therfore credits or any other known payment method are still recomended to use as when compared to cryptocurrencies .
no they wont. no bank will dissapear just because of cryptos . even if cryptos will become legal worldwide , there are still banks that we can use because we can only exchange our cryptos with the help of banks and any other fiat exchange whether it is offline or online .
In the credit system as such, there are a huge number of advantages that overlap the disadvantages of this system. The most important and impressive is that a person not being able to immediately make a certain object or service (home or car, for example) can take a loan to afford it. Of course, to some extent this is financial slavery, but there should be no problems with the rational use.