The hold is the best way to avoid losing money when the market falls. As the cryptos rate falls, the sentiment of most investors will be panic, anxiety, a sense of distrust in the market leading to panic sell to cut losses and serious losses. So at the moment, the exchange rate is down, hold and continue to invest as soon as the exchange rate is lowest.
Yes, I agree with you. Holding is the best strategy to get profits at the same time can push up prices if the market is down. Selling when it has to go down will only make a part of it disappear and the market will decline even more.