Currency needs to be stable in order to have long-term prospects. The dollar is stable because everyone believes that the dollar will be around in some shape or form in 10, 20, 50, 100 years. I'm currently investing in a retirement fund whose outlook is focused on 2055. Many other people are doing the same.
If you don't have this stability, your currency isn't really a medium of exchange; it's a commodity to be speculated on. And, well, as long as you GTFO of the commodity, it's perfectly fine if its value plummets or goes to zero. But something of this form will never become a currency because everyone thinks like this. It's just going to be a way for smart people to separate fools from their money.