People have been saying this about crypto for 10 years and bitcoin 30x'ed despite all the negativity, with tons of big institutions loading up on it behind the scenes. It's here to stay.
When you buy something at the store, the cashier doesn't question you how you got the money. They don't care. All they know is the currency is the proof that you did something, or sold something that other people valued.
Valuing a unique crypto hash is no more ridiculous than someone valuing a painting, old baseball cards, ancient pottery and all the other random stuff people collect and trade that are nothing more than a decoration.
Well, except crypto completely mobile, easy to exchange and can't be taken from you like all other the assets we have been exchanging since the beginning of time.