All depends on your time frame and trading style. Also, while today's pullback amount is in no way concerning for long term holders, it is strong enough to indicate the possible beginning of a short-term downward trend. I like to keep my profits, so when I see the possibility of a downward trend I take an amount off the table, sometimes a little sometimes a lot depending on my opinion about the trend. I could be back in this afternoon or tomorrow morning if signs point that. Or I might way for opex next week. That's how I play the game and it has been a pretty good strategy so far.