@cjd @nbs @Richard
You need quite a lot of abstract thought to trade an algorythmic solutions to an encryption problem that doesn't lead to directly unlocking a material good. Therefore, Bitcoin can drop to 0 any day of the week. It doesn't, in the same way, as stock market doesn't as long as the old guard lives and bets their retirement on it.
On the other hand, gold is shiny. And it will be that shiny thing edged into our DNA as valuable since before we knew how to wheel. The gold will always be valuable. Bitcoin on the other hand can have a stock market crash.