I still cannot believe anyone has any "real" money tied up in something like MtGox. Disturbing, stunning.
But you'll still see folks putting large sums of money into something like a small biotech company that doesn't have a working product yet.
It's speculation, of course, but that's the point. People speculate all the time, some of them with large sums of money. Shouldn't be surprising news.
That makes such woes some sort of contribution towards a better economy.