This is so easy, the biggest regret and regrets are not selling my bounty in the good old days. I holded it and lost it all, many times i have thousands in bounty payments but was thinking that it will go only up. Most times it ended with clode to zero in those assets.
Many people make that mistake because they are in the bull market, always wanting more profit and waiting for it. There was a time when I also had a lot of money from this market but the wrong decisions kept me from taking advantage of that opportunity. Btw never look back, please continue to invest in the present time so there is no regrets in the future.