How is all of this possible when the network is barely able to support half dozen transactions a second? It's not even enough to cover one shopping mall, let alone some "countries" or the whole planet.
I didn't say it could run a country's currency supply. I said it was an alternative to a country's hyperinflated currency, and it would be one of many. What normally happens on the ground in such a situation is that the average person will use an array of different currencies that are accepted in their environment in order to make up for the country's standard (so in Zimbabwe for example, people will use a mix of the USD, ZAR and a number of other currencies in their day-to-day lives).
Bitcoin is just another alternative. Yes you're not buying a loaf of bread at the corner store with it, but it's definitely useable (and is used) for other types of payments.
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