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?
Yes Op, I believe that as the demand will keep on increasing day after day so shall the market value of Bitcoin keep on increasing. But remember that Bitcoin market value Will get to height where its value will remain stable and then , other altcoins will start getting more acceptance world over and that will create a strong competition among them.
Yes even sometimes is going down but mostly up because of high demand and limited supply, i think it is good sign that bitcoin is proven that there are a lot of people using it and continuously increasing community of bitcoin. And it means bitcoin is good other than cryptocurrency.