I don't think a lot of what I'm hearing was bitterness. Instead, there was a (seemingly correct) assumption that Bitcoin was undergoing a massive bubble at the

I don't think a lot of what I'm hearing was bitterness. Instead, there was a (seemingly correct) assumption that Bitcoin was undergoing a massive bubble at the moment. There was a lot of signs similar to other bubbles, such as the late 1990s dot com bubble and the mid 2000s real estate bubble. There's no problem with putting a little into Bitcoin or other cryptocurrencies, but at the moment, it is a very speculative investment. If you diversify, and don't do something silly like massively borrow, then that's fine. In fact, this sort of investor probably doesn't care too much that Bitcoin crashed in value. It may go up by silly amounts, or it may go down by silly amounts. That's life with any speculative investment. I personally can't see Bitcoin justifying its valuation unless it fixes its transaction issues, but there is plenty of room for disagreement there. Now, the fact that a fair bit of current marketing / promotions of crypto has the whiff of pyramid schemes and other dodgy "make money fast" type things is of concern to me. Mainly because these sorts of things usually never end well. I think it would be very foolish to put a significant percentage of your assets into crypto right now, and it would be extremely dicey to invest in crypto on the margin. In fact, it would probably be better if one was seriously interested in crypto to wait until a major crash clears these sort of "you're gonna get rich instantly with CRYPTO!" players out of the market.