It's estimated that ~20% of bitcoins are lost forever- worth around $140 billion at the current exchange rate. It's a brilliant lesson on artificially induced scarcity and its effect on market prices. I'm just blown away the more I think about it. Some anonymous programmer decided to code digital money that is inherently deflationary solely on the basis of the algorithm that it's built on- and the whole world decided these tokens have value! One of these days, we're gonna see this spill out into real world wars.