What you say is actually quite difficult to implement because we can only identify a downtrend clearly in a period of 2-3 months. It is advisable to sell all ETH and BTC quantities when the market is down. Trading with a profit of 3-5% is sometimes not enough for a trader 's greed, so we often lose ourselves to bigger profits. Knowing that playing by principle can help us get a more regular return. But For me to master my emotions is quite difficult