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This is not an impossible scenario. People can now use bitcoin in any way they want to. It's inevitable.
Actually, we have been using bitcoins the way we want it to as early as 2010, right when it started to gain more and more value, be it for legit purposes or shady activities, bitcoin is being treated and used as cash, the way it was intended to be in the first place. As time progresses, we are seeing more and more usage for bitcoin and that's not only the money as it what's intended to be.