At least you didn’t buy bitcoin at $200 and sell at $400 thinking you made out like a bandit, like me. (I basically never think about this though, and it shouldn’t hurt your soul.)
Heh I bought at $20 and sold at $1000. It was only 1 BTC. I bought I think 2 or 3 and mined a bit too but back then exchanges got hacked all the time. Honestly I do not feel bad. Every pizza I bought could have been tens of thousands too if I knew how BTC would turn out (or Nvidia or Netflix or the outcome of any major sporting event, etc.). I made a profit and it helped at the time. I am not sore about it because I also do not know how many dumb investments I passed up that would have just lost money.
I was working with Bitcoin in my job back in 2013 when it was around 40-50 USD - if I see the charts today, it makes me cry every day - esp. since I was in that role, on the institutional side - and I didnt believe in it.
(though, I have to admit I was a student back then, but just a few weekends less with the colleagues would have made me a wealthy person)