[danaris]

Not the point.

Even if you set aside the transaction costs and the staggering environmental toll of Bitcoin, it just doesn't function well as a currency because it has been used, and is being used, as a speculative investment vehicle by so many.

You absolutely do not want your currency to be rising and falling by double-digit percentages in value even over the course of a few years, let alone a few days the way Bitcoin frequently does. Furthermore, people accepting currency don't want that. This is one of the major reasons so few people do, in fact, accept Bitcoin as a means of payment. (Yes, I know some do. It's still very few, and always will be.)