Speaking of bitcoin, bitcoin has helped my life, especially in my family's current economy, which I can tell very well from before, and I regret a bit because I know a few new bitcoins a few years, if only I knew bitcoin from scratch maybe now I already a millionaire 
It depends upon the situation because there are some people that they don`t think about the future of bitcoin of what`s that purpose of holding it, having regrets is just a part of our life that we cannot actually move on from that move we don`t actually want to happen.