People overestimate their ability to pick stocks when they are up. Not everyone gets lucky.
(For the record, I am up a lot but I sold my NVDA way too early to take advantage of the current hockey stick)
I definitely have other bets which did NOT work out; FSLY -90.58%, ZIZTF -76.81%. These were smaller bets, I'm still bag holding hoping Nightingale turns it 'round @ FSLY.
I recently exited AAPL in May, which turned out to be a poor move.
I'm definitely NOT great at picking stocks and I probably do overestimate my ability. Look at my horrible FSLY pandemic trade.
Taking direct control and responsibility has been a good learning and overall financially rewarding experience for me.