I don't know a lot about them but I had an auld fella in the cab last night, he recognized my name from my I.D. and asked me if I knew an old work colleague of mine, he then told me (well steamed) that himself and my old work colleague had gone in to the bitcoin business some years ago, I hadn't much interest in his conversation.
It was only a very short journey 6.20 on the meter but he gave me 30Euro saying; "That's grand, keep it, I have loads !".