Bitcoin = Digital Gold
Ethereum = Digital Computer
Litecoin = Digital Silver
All of this could still spark growth, considering we are still in early phase. Once the path is cleared specially regulation issues and uncertainties I think it can go bigger than we might expected.
Monero = Digital Cash
I'm uncertain of the future of privacy coins, it is hot in the eyes of the regulators. It may not exist in the next decade due to its nature, just saying.