There will only ever be 21 million Bitcoin. No one knows why (they might say they do, but they don't) and it's set off a frenzy of 'mining' which is sucking up power and pumping out carbon. Is it the madness of Easter Island all over again? A mad rush for a symbol of wealth that ends up undermining our ability to protect our ecosystems? We take a wry look at the subject. Turns out the Easter Island story might be a myth, but the rush to mine Bitcoin is very real. 
Includes an acerbic interview with David Gerard, author of The Attack of the 50ft Blockchain.