You only pay capital gains tax when you sell, so f you didn't like most, your not paying. Plus there are many known loopholes to avoid paying the high cap gains rates.
Discussion
But, the gains are (largely) not real. They are the result of inflation. You generally cannot buy more stuff with your assets after a couple of years. (except some lucky hits like early investors of bitcoin and tesla)
Everything mean reverts. I like saving in Bitcoin and making money in fiat to save with.