Lots of people saying hold no matter how high the price goes. Don't forget to hold when the price goes down, which if you bought them recently it's very likely to.
If you look at the charts for May-June 2011, bitcoin reached $30 at one point, and then crashed $2-4 for a long time. Basically it was low long enough for a lot of people to cut their losses at a low price. It takes so long if your watching it, the temptation to try and trade is very high. Basically it often takes so long that you really think there is no chance it will ever happen.
Personally I will be very surprised if you don't lose in the next couple of months, at least temporarily.