when the coin price that I have continues to fall, then I will definitely keep holding the coin that I have, because I always invest in the top 100 coinmarketcap, so I'm sure the price of the coin that I have will definitely increase again and give me profit even though I need to wait for a long time.
There is no guarantee that the prices will recover, even if the coin is listed among the top-100 cryptocurrencies. If the prices continue to go down for an elongated duration, then it is always better to sell them or convert these coins to some other currencies such as ETH or USDT. Once they fall outside the top-100 list, the decline will be much steeper.