Hi guys,

I have this question in my mind for some time, not sure if it is a noob question.

As title, how does one coin possess value in USD? I understand supply & demand that drives bitcoin value going up, as bitcoin can be used to purchase physical goods.

But how about other alt-coins? Like ethereum for instance?

1) Ethereum - strong team, and good project
2) IOTA - new tech (tangle)
3) Ripple - working with multiple banks, good reputation

*Note: I'm newbie here, so do take my picks with a pinch of salt.

Any comment is welcomed!