There's always another option. But low and sell high, if you happen to buy high by mistake, hodl! If you sell low, buy back lower! 
The problem with this nice piece of advice is that you never know if you're low or high. Bitcoin at 6000 could be low, but it also could be high. Selling at 10000 could be high, but it also could be the new higher low.
The problem with this nice piece of advice is that you never know if you're low or high. Bitcoin at 6000 could be low, but it also could be high. Selling at 10000 could be high, but it also could be the new higher low.