Fiat is manipulated by governments/banks to control & have power. Whales heavily manipulate crypto. By switching to crypto, isn't it just handing the control & power from governments/banks to a small group of wealthy whales?
Governments inability to manipulate crypto because of the blockchain tech is where the advantage stops. Apart from that, I don't see how much anyone can do with crypto without going through FIAT. Well, before you argue this - How did you get your first crypto? Of course, you bought it with a fiat, right? That's my point!
Crypto and fiat should exist side by side, and not one getting looked upon as having the ability to surpass the other.