I don't agree with that as an inevitability. The majority of coin, at least right now, is held by individuals. Meanwhile, fiat is still crumbling before our eyes. You think every miner and node is going to go offline just because everybody isn't buying their groceries with coin? Myself and millions of others are going to keeping mining, noding, and stacking and waiting for the inevitable collapse. Also, if a company is going to accept Bitcoin as payment, they damn sure aren't going to accept it without understanding it first and the only way to understand it is to have it and get accustomed to what you can do with it. It failing at all doesn't make much sense at this point, especially at a point in history where the manipulation, extortion and war that goes on under and on behalf of a fiat standard is better understood that at any other. Saving is a use case for money. I accept Bitcoin as payment. Others will too. But this fear mongering shit is very fiat behavior and I don't take it as truth for an instant.