Biggest regret? o i want come back 2017 because the year i lost a lot of money because i was not good at holding. Moreover, at that time the prices of btc, eth and other good currencies were low. Also the time was right to invest so i think the years of the past were the best for the crypto market. Over time the crypto market has changed where investing is more risky right now. However if i could go back in time to the past then i would first make myself proficient and then buy, sell, hold tokens at the right time.
I also think that just like you, in 2017 I didn't know anything about the market, I had no idea that the market had phases of accumulation, distribution and bullish and bearish trends, usually at that time I stopped selling some coins at 20USD that was in a privacy project where most of the airdrops were around almost 2000USD per week, I think that if I had sold at the highest peak I would have made BTC and still had it, but things are like that and they happen for a reason, that is why I want to take advantage of every The moment the market gives me an opportunity to enter, I will do it, because something I learned is that the market always gives profitable entry values.
