Sell when it's high and buy when it's cheap. I think you're on to something there !If he wants to protect his remaining bitcoins then it’s good to store them in a cold wallet and just forget about it. However, to make those bitcoins generate profits for him, he should consider trading them. Sell when Bitcoin is at its peak and buy again when it’s at the lowest price. The profits earned can be used to buy more bitcoins or any other asset.