Perhaps in the future people will have no choice and they will be forced to use cryptocurrency, or maybe there will be some alternatives. It is difficult to answer your question now. But the fact that the blockchain technology is already actively used is not a secret to anyone.
but if there is a technology coming in and that is better than crypto, crypto can be removed and people will use new technology, so in the future we don't know what will happen.
but I think Crypto is still the best for the next 5 to 10 years.
It takes too long for a technology to be implemented. Look bitcoin, it's more than 10 years old already and the currency is barely accepted by merchants yet. Until a new technology appears, become popular and be accepted, it will take a very long time.
I think crypto is free to reign for decades at least (considering the decentralized sphere will be respected by authorities).