I have no regret. If I would change some things on better. Lets say buy Bitcoin earlier or sell all in December 2017, I could also turn things on worse, so buy much more expensive and spend when price was low. Regretting things to have them perfect is waste of your life, since is impossible to make anything perfect.  Go play basketball right now on World championship then. You think you can do things perfect why cant you play basketball perfect then.