The argument goes both ways - a lot of people investing on the stock market are also gamblers betting that their investments will go to the moon. The only difference is that a lot of non-performing companies get culled before they IPO or shortly after. And after a company lists, the market tends to (although not always) re-value it accordingly.

So, of course they'll be gamblers in crypto and every new field - what matters is for there to be a critical mass of builders making things that can be used on a day-to-day basis vs. those trying to hitch a ride on the bandwagon.