However, an accredited investor might just be someone who got rich through inheritance, i.e., not at all through their own doing, so I don't think that accredited investors necessarily know more about investing. They can, in theory, weather a loss more, depending how much they bet, although AFAIK there are not restrictions on them betting it all.
People are allowed to buy lottery tickets. They are also allowed to bet it all at a casino. Why shouldn't someone be able to put even a small amount of money in crypto? Maybe it pays off for them, maybe it doesn't (just like lottery / casino / etc., and I think they have a better chance in crypto).
That said I don't really like centralized crypto lenders like Celsuis, Nexo, etc. If anything, I think people have a better chance just buying crypto at spot price and not lending it out, although if someone really was set on lending out their crypto, they are better off with the decentralized lending alternatives.