It depends on at what price you actually bought your coins, if you bought at lower price then you should not hesitate in selling at current price if you are earning profits from it.
Exactly. Don't be greed too much waiting for that high price because ometimes holding too much will just result for a big loss. Once you make profits don't hesitate to sold it depends on the current price trend and rally.
Yes I recently sold majority of my coins as it was giving me almost double profits on my investments, so I preferred to sell it and make profits from it.
It would be nice if you can hold you coin for a longer time and that is because there are now more people that is going to use Bitcoin and that is perfect for the currency itself.
And the chance is also higher that you can make some profit with it and that is perfect for the users.
No, I think he did the right thing by selling as he earned double of his invesment, its good to see that he didn't get greedy and holded for long time to earn more profits which might not possible if price drops.