Learning : This event taught us that whenever the market goes many folds high then its the worst time to invest. Do not think that if the market has hiked itself heavily means it has become stronger and it will grow even further. No, that is the worst outcome you can predict from that. So whenever the crypto currency is in bull run ( ~ 20% + high from initial value) then its not the time to enter the market but to halt your trading operations.
This piece of advice is golden and if possible I would have it framed but then again the market is a two-way which is we need people who believe in the hike to bring the money so that others (the so called smart ones) will dump on them and make their profit. There would be no form of trading happening if everyone is a smart ass and refuses to invest.