The main thing to remember with markets that have ponzi characteristics is that there are tons of latecomers and few early adopters. While the early adopters might HODL in the face of a 70% downturn, the late adopters won't. They FOMOd in because they couldn't stand seeing their friends make easy money any longer. They don't have conviction because the only reason they're in is because they didn't want to miss out.
This doesn't just apply to NFTs but to everything from crypto to meme stocks (AMC, GME, BBBY, EXPR), to SPACS and to ESG stocks, to shipping and commodities, and to leveraged or speculative ETFs.
When this bubble pops many assets will be priced way below their actual value. This overreaction won't make any sense on the way down just like it hasn't made any sense on the way up.
For this it doesn't even matter if NFTs provide real value and are here to stay. It doesn't matter whether a market behaves like a ponzi because it's fraud or because it just got too much social media coverage. The only thing that matters is whether a large enough percentage of the market consists of latecomers who will panic sell. If so, any bad news and POP!