There could be a few guys like that who have entered the hobby, but I doubt there are enough to fully explain the recent trends. A lot of people are staying at home—bored to death—and spending their cash on everything and everything. In 2020, people were allowed to take $100K out of their 401Ks early without the usual 10% penalty, and a lot of people did. Interest rates are low, so some people are taking equity out of their homes. People are working from home and saving money by not paying for day care, not traveling, not eating out, etc., etc. They have money, and money burns holes in a lot of people's pockets.
Regardless of what's going on with crypto and the stock market, I don't think the various collectibles bubbles will be popping quite yet because the circumstances that helped to create them won't go away until the pandemic is in our rearview mirror.
With comics, moderns will probably be the canary in the mine. Other bubbles (BA, SA, GA, OA) will not pop before that one.