Now is latest time to sale your Bitcoins, because the price now is more than 16 200 USD - http://preev.com/. So you can make extremely good profit now, it is not wise to wait more, because Bitcoin price can go down. 
I respect your opinion, but why do you think this?
At least give some reasoning.
It COULD go to 13,500 or it COULD go to 19,500
Overall trend has been upward...
This is very true, but I've seen investors say this about the stock market, and it has gone to the moon...
You need a sound strategy were you are selling a little as it goes up and buying as it drops...take profits at times...buy if the price collapses.
It ain't easy, balls of steel help.