Physical money is an industrial and pre-industrial idea, one that doesn't belong in the current epoch of human civilization. In the industrial age if someone took a can of something off of the shelf, there was one less of that thing. Physical money and it's online analogs are very much a part of the same idea. They are physical, semi-zero sum game ideologies applied to information systems, which can disseminate nearly infinitely by comparison.
For example, if you give out a digital can of something, you still have infinite cans of that something left (for as long as you have the blueprint for it). The real miracle and potential of cryptocurrencies, aside from their decentralization aspect, is that they have the ability to model value directly. For example, with physical money ideologies you need ridiculous and clunky methods (such as commercials and advertising) to extract value from valuable products of various sorts.
But with cryptocurrencies that is changing. For example, Steemit has no need for advertising to clutter up and detract value with its ugliness for exactly this reason. It can represent the value directly. In other words, the fact that someone values something should be enough to generate exchangeable value.