There are regrets in swing trading. You see things. You saw things. You knew things. Or you didn't. You held 800K in Danaos (DAC) shipping at one point - you made 8% profit and you sold, worried about a crash in shipping stocks. Why? No good reason. Money makes you nervous, especially big money. Your portfolio got hit meanwhile - big time. You made nervous moves. But if you'd just held the highest rated stock of 2020 (DAC) for a few months longer - you'd have doubled it (100% gain). Your gut knew this. Your head lied to you.
I know I sound crazy. Not a calm longterm investor. But I cannot just stuff 1M+ into growth stocks and sit still. I will get to 100% gains again, in time.