I am old enough to have lived and lost in the dot com crash. The loss was huge and out if my control. What I learned then was to cash in to build your security pot shall we say. Next lesson was to spread the risk away from a single point of failure - and in crypto there will be a lot ranging from shady operators to regulation to hacking to liquidity traps.
My crypto strategy is about setting aside a comfortable amount that you do not need to touch. Set that in thirds. One third buy and hold. One third find an earning vehicle. One third start mining. Risks are hedged that way
Could not have said it better myself mate! And yes, I was old enough for the dot com crash to. Those lessons are paying dividends now :-)