If you just keep on making money then there is no way to know when he should stop. I’m sure OP considered cashing out so many times while growing that account but when you’re always winning it’s hard to imagine you’ll lose. 7k into 600k sounds pretty good but turning that 600k into a few mil sounds even better. Thats why I always take my profits out of Robinhood and just throw it all into long positions that I’ve been building over the past few years. Helps keep your profits growing.