Western Union isn't a currency, it's a service. Nobody uses western union to make actual purchases. Nobody is going to pay 18% fees for currency. That's the thing, it's all just an idea. Personally, I think it's unwise to invest in an idea. You invest in tangible entities with ideas, or better yet, actual products. In 5 years, we'll hear about some amazing stories of people that got in, got out and got rich, but, those stories will pale in comparison to the ones of people that lost absolutely everything and threw themselves off a bridge.
Crypto currency has a future, but only if it's, you know, an actual currency and not an idea. Unless of course you're looking to launder the millions you've made selling kilo's of the blowcaine.