What will you do when BTC is 1M USD today's, 2014 buying power each?
This will never happen.
It have a chance to happen. Just like when people were saying 1$ is expensive.
Nope. We are talking about 2014 buying powers. You really Need to find a lot of morons to push the Price to 1M $(stable, and not only on 0.0001 btc volume).
Ofc I would be happy to be a billionaire without doing anything. But I would sell at least 60% till then. Profit locking is important. Otherwise you are sitting on virtual profits and when the time to sell Comes, you lose a lot of your virtual profits (cause all others are selling too).