But there's so few uses of actually buying things with crypto. People don't use it as a medium of exchange outside of illicit goods and money laundering. We're more than a decade into this and using crypto to buy a pizza is still a novelty.
A major proof of this is that FTX collapsed and took a chunk of the crypto market out with it. The market at large shrugged this off. If it were actually linked in to the broader economy, then it would have had similar ripple effects to a major US bank failing.