Crypto will never crash the system and replace money, at least not in north america.Everything is enforced by laws, like a law that tax needs to be paid in cash, on all items, no matter what the person pays with.Sometimes it feels like people think if we all go crypto, money is somehow going to be free, and life is going to be so much easier, I don't think that's true.Imagine if you could only buy bread with crypto, and some billionaire buys a large amount of crypto the night before, the next morning your bread will cost twice as much.In other words its a rare resource, basing prices on crypto doesn't make sense.It can represent money all day long, and have value based on the dollar, but I don't think it can be money, unless governments just make digital cash for us, that doesn't jump too much.
For cryptos to be successful it goes against the governments for sure, maybe it looks impossible for now but if people all around the world moved to cryptos then you are the only one using paper money then you will also love to move which takes years but it will happen.
yes of course cryptocurrency can be a very appropriate choice for the future because cryptocurrency can move without using paper money anymore so I'm sure local paper money and fiat will be destroyed someday.