We just explained how it’s usable in the real world, and works just like any other currency in every way. Let’s recap:

1. I purchased a service with Bitcoin earlier

2. Bitcoin can be exchanged for the US dollar, just like you would have to exchange the US dollar for rubles in Russia

3. You believe I can purchase things in a store without money, because homeless people do not accept debit cards

I don’t really know how to debate 3, because it’s incoherent to me.

But if you understood fractional reserve banking, then you would know that you’re correct in saying I don’t have money, because the banks do not hold our money. They issue credit every time you swipe your card. You should go read up on that, and then we can talk about it if you’d like.