Well, bitcoins might be less accessible if most of the people would not want to sell them, the price would go up even more dirastically. In terms of access, they still will be traded on exchanges so if you've got fiat, you can buy it.
maybe for now crypto currencies are difficult to access because there might be legality problems, if cryptocurrencies are recognized by all countries and legality can be done it might be easily accessible because cryptocurrencies are created following the development of efficient and transparent practical technology