I've had these situations, too. In such cases, I had to sell the coin at a loss. Then I realized that it's really important to have an understanding of what you're doing. In another case, you will constantly incur losses.
Well, sell at loss is sometimes and option if you know what to do (like to add your capital to buy a token that you already know it will grow up). But if you just sell them off because you can't wait to get a profit, then it's totally a wrong action.
Yeah that could be one genuine reason to sell off at loss to reinvest the capital in another asset if you see profit in it in days to come. I think that people do that but yeah, if you have already invested in one capital, you would have researched about it as well which means that it will grow and could gain value. It is normally good to go with a coin you have researched about and invested in. Leaving one investment in the middle without gaining profits from it sounds a bit immature.