Is Bitcoin the future of currencies? Well it's too early to say right now, but probably not.
Is Bitcoin the future of crypto currency? It is for now and will probably continue to be so for the next year or two.
When it comes to understanding which crypto will last, we can't really peer into the future and get told which coin is worth it. A altcoin could end up on top of Bitcoin a few years from now, we simply don't know.