In order to double your postion at the time you buy back, it means that the price will have to go down with like 50%, and exactly that is something I don't see become reality. That's not a correction anymore, but a massive crash. Also, as you stated, the price will need to come down in order to buy back. If you sell too soon, you'll risk falling behind as the price will likely move up further. Buying back isn't as easy as it may seem. If you time it wrong, you'll end up in a big disappointment. In that regard, for the average person it's better to just keep holding.