Believe u or not: ordinary money is only a colored paper...
I'm sorry, but likening fiat currency to cryptocurrency is just stupid. The value of fiat currencies are supported by a monsterous amount of variables, whereas cryptocurrency is merely supported by... Whoever supports them.
People have argued that the value of cryptocurrency has to do with total supply, but I'd argue that it's more to do with demand (driven by support). For example, I think Litecoin has maybe about a 17% difference in total supply compared to Bitcoin, yet Bitcoin is valued far higher. It's all about popular support.