I don't think anyone made that argument here, but that is certainly an interesting question to ponder vis-à-vis bitcoin - if it *were* to become the dominant global currency, and given how it encourages saving, the economic landscape would change in quite fundamental ways.

Not all of this is predictable of course, but e.g. you might be a bitcoin millionaire -  but forget about buying that new Ferrari, no one would be around to make it (because the opportunity cost of simply sitting on the coin rather than investing in infrastructure would make it extremely unprofitable). The only things people would still be producing on an industrial scale would be necessities, and prices would be very dear.

People would therefore likely group together in largely self sustaining communities, but since control of land and other resources will be concentrated in so few hands we might see pseudo-feudal systems developing, where land is exchanged for labour by local mega landlords.

But I digress and this is all just speculation. Sorry.