The biggest regret I experienced after knowing bitcoin was I sold about 5 btc late last year for about $ 900, if I hold now I certainly get more profit.
I even sold a little by little. 1 bitcoin at $1,000. 3.3 bitcoins at $2,300 and mostly there's a lot of it that I sold at $800. I can't remember on how many. And I do regret for having lack of knowledge by that time. I didn't believed before that bitcoin's price will even reach at $2,000 and now we are heading the $3,000 mark spot.
For sure many did this but by that time it's not a mistake. Why would you sell at good price if you don't know that the price will still go higher? This is not the worst decision but only a simple mistake although there's a profit already. But computing on the possible profit it's way bigger and you'll think about your loss which you shouldn't.
