http://blogs.wsj.com/digits/2014/04/02/bitcoin-price-to-1-million/
The guy from Xapo predicts 500 to 1 MM. I can definitely wait 10 years for that and be a happy man. I hope he is right, and his prediction is accurate. One doesn't make such predictions unless you aren't 100 convinced that it will happen, because making wrong predictions hurts your business and he has a Bitcoin business.