Cryptocurrencies are not accepted legally in most parts of the world.
wrong . maybe you should have said that it is not banned , but it is not illegal as well.
Even if they get accepted worldwide, it will take decades for them to reach everyone and getting used to using them is a far cry.
what? will took decades? did you understand that Bitcoin is just 12 years old but the world already Knew about the coin? so how come that there is decades more?
Moreover, not all people will be able to trust cryptocurrencies. They will always prefer fiat over it.
That is what thinking from low minded people, because most of us are aware of how crypto will provide and what fiat cannot .