Since the total number of bitcoin is fixed, so the value of bitcoin will keep grow, and it's price will keep grow also. So will there a price cap for bitcoin?
bitcoin can increase its value for a long term because as you can see know a days the bitcoin value have increase and so many people thinks that bitcoin can be the future currency for the money. and because of the people that trust and invest in bitcoin i think that bitcoin have a lot of potential to increase its value forever.