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I can tell you what makes ripple my favorite coin, it solves a serious problem for international finance and currency flows. There's $90 trillion worth of global wealth in currency and it's always moving. Plus at least $250 trillion worth of private assets that banks can lend against. Even if that's an overestimate, the potential of Ripple to manage those currency flows -- which underpin international lending -- make it a potential game-changer.

That's why the developers are working with big financial institutions and why they minted 100 billion XRPs. It's also an edge from regulatory standpoint. And, they're releasing coins to the public very slowly, to keep prices level and gain trust of potential users.

It will take a while for the big players to get comfortable with the blockchain, but once they do Ripple is going to be huge. Probably not $15,000/per huge, but easily $20 or maybe much more.

Unless, of course, something better comes along.