I'm not sure why FOMO has to do with any of this. Your logic also just doesn't make sense when talking about any investment. If the market value goes up and you continue to hold then you can sell it for more than you bought it for. No one is talking about regret here except you. All investing is speculative. That's the nature of investing.
Yes, I misunderstood the point.
The US government gets rid of Bitcoins ASAP, and I know of businesses who accept Bitcoin and who also sell it ASAP.
Also, considering that early day cryptocurrency enthusiasts were also bullish on the technology that adjusts the chance that they'd keep some. I'm not sure why this is such a debate. The original comment just said "hey, they might have kept some of that crypto that people would pay them in. If they did, then they probably don't have to worry themselves with money." That's a speculative comment but also has a decent likelihood of being true.