It depends on what your intentions are. If you're just day trading your way through the market right now, then you can make a decent profit in quite a short time. But if you plan to wait for the price to go way over $900 where you cash out again, what would be your aiming price? I personally would just keep holding to at least the $1000 level. If you secure profits at $900-$920 it's not really worthwhile as the chances are high that the price will go up further