I was just thinking that since Bitcoins is 100% on the internet, what would happen if the whole world adopts it and 20M bitcoins gets stolen by a genius similar to what happened to Bitfinex?
I don't think such a thing will happen since the 20 millions Bitcoin are not in the same wallet or exchange. But I believe it will be possible when you talk about thousands of Bitcoin and not as you rightly mentioned 20m above. And if it eventually happen, they themself will loss a lot too because it cost them to hack and Bitcoin value will decline.