in this case I usually use the short term method but not by selling 100%, I usually use 100% of my funds to buy one of the coins and wait for the coin price to grow until it is time to sell, when selling, I will not sell all the funds me, but I only sold 70%, the rest are waiting for the right time to be sold again what if the coin starts to grow, this may be just a basic method that I can convey to you.