Getting married
Not hanging on to all the BTC I had when it was under $400 and then under $1000
Not hanging on to all the ETH I had when it was between $10-$50
Not hanging on to all my TSLA stock I had in early 2019. Had $5k worth. Would be worth $280k today
If I would have done all the things above. Would definitely be a millionaire. Probably a couple of times over