I came across this 1994 clip of the US ‘Today Show’ and apparently the answer to this question is ‘…it is that massive computer network, the one that’s becoming really big now…’, well that is all true but it interesting that this was only 21 years ago.
This clip here (9 mins) is a great overview of bitcoin. Bill Gates, initially sceptical, now says it cannot be stopped….and that’s a good thing!