I think the true answer to this question is that it was/is a gold rush with low interest rates that led large amounts of capital to be allocated to less than competent people. In particular, the companies and operators that look the smartest when a bubble is inflating are the ones that genuinely hedge downside risk the least, while pretending to enough to fool people with capital to allocate. This only becomes apparent, of course, when the bubble pops.

As you may notice, this also describes the tech VC bubble of the last decade, too. However, where normal tech has already found its use cases and does real things for real people in the real economy, downside is a little more capped. If you want to be generous to crypto, it's currently tech in 2000, where almost everyone has a total nonsense business model, but that a lot of the vague ideas will eventually find some variant with product-market fit. If you want to be less generous, it's all a house of cards.

EDIT: I'll also add that, of course, thinking very carefully about which narrative is true here and being right is the stuff fortunes and careers are made of. The people that weren't dissuaded by the tech crash in 2000 profited handsomely by thinking carefully for themselves about what was actually true and what information was actually latent in the financial crash. Of course, the tulip true believers in 1638 didn't fare nearly as well.