No one willing to sell for loss but it will happens once you done the trade so what you will do if the price of your coin lost once you bough it?
You have two choice right,hold it until the price goes up or just buy more with cheap price and make recover from losses even if there is slight increase.
the two choices you offer are often done in trading. I use both, especially if I trade two assets at once, I will use both methods for each asset I trade. and that was proven, I was able to return capital with profit, even more.
These are the only two options available for us to make profits from trading,the loss of our capital can't be restricted even by holding as well but the process of recovering the lost amount depends on our strategies or principles or as how we call it as.