I do not sell much every day. Basically, my investment is designed for a long time. I wait until the coins begin to grow strongly, only then I will sell part. It's hard for me to play on the stock exchange and catch small price changes. I think I would have lost more, since I have no experience.
I agree with you, long-term investment really works for me too. I have invested way back 2015 BTC and I encash the half of my profit Dec 2017, which I really earned a lot. Now I invested not only in 1 BTC but to top 5 altcoins in the market. If BTC fails me, I always have a backup which is the altcoins especially ETH and LTC. I always buy coins whenever the market is at the dip and hold them until it reaches the highest market value.