my opinion if you are a trader and is hanging in high price, keep holding or you losing a lot. and if you are an investor, don't invest before the price starts to improve
Basically, it's better to invest while the price of cryptocurrencies are low to have a better volume of that certain crypto. Once its market price started to grow, it's already a winning situation and it's better to hold it for a while and closely monitor the movement everyday and sell it when it's already a good price for you.