Don't forget, "bringing value", like in "growing market value", it basically means someone thinks it's worth buying it. If someone is buying it, they are also selling other currency bringing down that value. If people are spending fiat buying the new coin because they believe in the project, the value of crypto as such goes up. If people are trading one coin for the other, the value of crypto as such stays constant, it's a null-sum-game.

There is also the usability-value - but don't forget the importance of the network effect. It has become very difficult to use crypto now, with Bitcoin the network fees are too high and/or the reliability is too low, with other cryptos there is a jungle to choose from. I'm suggesting ETH and BCH for my peers, but they respond that they can pay with LTC or XMR :/

I've been an ethereum supporter for quite a long now, even if it has it's weaknesses - I believe it can be really useful, and it has almost the biggest market cap - I should probably spend time learning to program ether contracts instead of writing comments on steemit and reddit ...