I would like to ask you that at what price you bought your bitcoins? Don't sell it if the price is lower then you bought, just wait for a while, sell it when you are earning atleast little profit out of it.
Well I think he bought it for a lower price if he have the guts to sell it at $400. But I tell you man the price is now fluctuating until $450 that is a $50 dollar profit. You just need to be patient and be at the right moment at the right time.
Yeah, patience is the key here, if you panic, you loose, so its better to hold at a moment and wait for the right time to sell your bitcoins.