This has happened to all of us. In 2012, I bought 45 BTC at $180 each. And I sold them a year later for $1,000 to buy a Porsche Cayman when I turned 18 and got my driver's license.
I mean, the Porsche Cayman cost me a whopping 2.5M if I think about it.
Now I have a Jewish mentality and I don't sell anything at all. My girlfriend tells me that I have a kind of financial Diogenes syndrome, of accumulating some shares that are literally s**t but that I am embarrassed to sell.
Another book that I really recommend reading is "Misbehaving: The Making of Behavioral
Economics" by Richard Thaler. More focused on the sociological aspect of economics. Well, I recommend reading any of his books, they are simply brilliant.
Can you recommend any books outside of the usual must-read ones? You have a lot of experience, you could even open a thread in the Gold group recommending your essential books outside of the typical lists that everyone can find on the internet.