I have learned to change the strategy according to the market, now only holding is not that beneficial as it was before because market has become too much volatile as compared to past.
To invest in some leading alts will be good if you can stay connected with the market and can take quick and wise decisions with respect to the variations of the market.
The biggest learning from the previous crash is never listen to the hypers, spammers, and analyst. I should trust my personal judgement and never depend on others. Study hard to learn the technical and evaluate the hypothesis made. In trading never trust others because the motives are not clear whether it is good or bad.