Generally all cryptocurrencies do have a potential to be profitable. This is how the system generally works and what makes companies invest. All alt coins are connected in a sense that one is convertible to another. That is the potential of the cryptocurrency.
not all crypto currency have potential to have profit. Did you see many airdrop, sh*t ico happening? That why not current worth or will bring back profit.

As I was taught for a long time and as famous authorities say, only 10 percent of all crypto-currencies have real potential, everything else is just a speculative element.