In times of extreme greed I usually stay out of the market waiting for how everything is going to unfold or in the event that I am exposed to the market I can make small sales in certain cryptocurrencies, according to the movement reallyTrading is based on sentiment sometimes, and You can take a trading decision based on sentiment.
If there is extreme fear in the market, You buy.
If there is extreme greed in the market, You sell or stay off the market.