That is really sad to be involved with Bitcoins in 2016 and not buying large amounts back then, I made the very same mistake like you. My first introduction into Bitcoins came in also in 2016 when I was trading CSGO skins actively. Every time I cashed out my winnings for real money the websites offered me withdraw the money from the exchange in Bitcoins at a much lower fee than via bank transfers. So for roughly 1 year I was buying and selling bitcoins a lot and managed to get my hands on a lot of coins. In one case opening alone I managed to get a 1000 USD skin which was my biggest profit. For that I bought a new bicycle which got stolen 2 years later. Sometimes I still think about if I just had kept all my bitcoins back then and not sell any, it would have been a nice profit today. Unfortunately we can't turn back time and need to live with our decisions. At least I learned from that to never sell all my bitcoins ever again.