I think you are reading it wrong. It isn't about greed. It's about recognizing an opportunity and having the drive and interest to jump on it, sometimes at great personal risk.
I have failed to recognize and/or act on a number of opportunities so far in my life.
One was when the consumer Internet was "waking up". Domain name registration was free. And, even later, as Network Solutions started to charge for them, domain names, good one's, were plentiful.
And so, there I sat, living through the technical birth of the Internet, fully understanding it from an engineering perspective and yet, due to my lack of experience at the time, never made the mental connection to the opportunity that lay ahead. While other less technical people gobbled-up tons of good and very valuable domains I was geeking out making use of the embryonic consumer Internet. These people made millions. I did not.
Another missed opportunity happened during the economic downturn of 2008. The market crashed. I had been a day trader a decade earlier and have always kept a level of awareness about the market. I was on the phone with a friend and made the comment that Ford was an absolute goldmine as it had dropped down to about $1.50 per share. The company had none of the problems the other auto makers had. It just got dragged down with the rest of the market. It told him I should get off the phone and buy 100K shares of F.
In other words, I recognized the opportunity and had the ability to take advantage of it. Yet, I did not. I would have made somewhere in the order of $1.7 million inside of a year and a half or so.
I'm sure people who also recognized the opportunity and brought themselves to pull the trigger made a killing. I, for some strange reason, did not.
I look at cryptocurrency and your comments the same way. You probably recognized the opportunity yet did not act. This has nothing to do with being intelligent or dumb. I have no clue what it is but it happens.
I wouldn't feel bad about it at all. Plenty more opportunities ahead. Just try to grab onto of one when the time comes.