With any coins or stocks. Buy & when the prices go higher, sell if you want that money then. If not hodl. Sell when you really want your money back. I sold all the BTC I had at 11K right after it reached 20K. I used it to put into steemit. I did lose some since I could have sold at 20K. But look at it now. Plus the little I had I got all CPU mining. Right after I sold is when it seems to have crashed. I guess I happened to pick the right time to sell, besides when it was higher than that.