GP post is suggesting that demand for this kind of speculation was up, and if that's the case, many of these people in the "market" for scams and gambling might have been more attracted to crypto because it still had some veneer of safety/legitimacy about it.
Nobody could plausibly claim that now that the failures are finally coming to light, of course.
Edit: I would suggest this is largely a failure of the media, which had long treated crypto as legitimate by default despite having the resources to pay real experts to actually cover it critically. Of course, even had traditional media outlets been sounding the alarm, who knows if it would have mattered much - faith in media is very low right now (exactly because they so often get this sort of thing wrong).
This time, as the FTX mess shows, the blame is on """regulators""" and """sophisticated""" investors completely failing to do their job.
The crypto schemes are very often rehashing of old scams and mistakes, they are not qualitatively different from penny stocks pump and dumps, pyramids and MLM schemes, ponzi schemes, tulip/cabbage patch/whatever mania, etc.