This leads to a pretty interesting comparison between plain cryptocurrencies and NFTs. Cryptocurrencies are beanie babies: Once available for a trifle, their value has ballooned based on speculation. But that already happened, you missed out on it, and it has no bearing on their future prospects. And if a bunch of people ever feel the need to cash out at once, they'll find out just how much value they really have whe…
Also, financial instruments work differently from physical assets; if you have conviction that the peak has already happened ("the bubble happened, and there won't be another one"), you can take a bet against the price by shorting.
Of course, this leads to very different kinds of market dynamics which aren't directly comparable to the beanie baby bubble. Too much pressure on the short or (with leverage) long side can lead to liquidation cascades which result in very dramatic price movement. On the short side this would look like a short squeeze as a large fund can buy a bunch of the crypto to liquidate shorts, then sell it after the market moves at a profit.