I did told myself to sell my bitcoins when i hit 6 to 7 bitcoins, though when its price is really going up high and really crazy i dont know if i want to sell it or maybe just convert it and buy some things. Though i do really want to sell some.
If you refer to all your Bitcoin holdings, I think selling everything could be a mistake. In the same way, I also think not to sell anything, if you need the money, it may be a mistake, as price could fall again, and you would have to sell at a lower price.