Hi folks!
            I've read books, looked at youtube but there is something I still don't quite understand. The Blockchain idea is brilliant and I can see the huge advantages in using it. What I am not clear on, though, is if you used a blockchain to buy something. Is the whole point that you buy and sell using cryptocurrencies and you don't have anything to do with $/£ etc? Not only that, you couldn't buy a car or something on the blockchain without using crypto? Please tell me I'm correct!