To clarify, I meant options to buy real stocks like Microsoft or IBM with Bitcoin.
Or alternatively a stock simulation game where you can buy and sell in-game stock-equivalents at reduced prices, for example 1% of the real price. If something like that doesn't exist it would be a cool idea to implement. Of course it would need a sync method, for example buy/sell prices synced daily to 1% of the real stock market.
Ever heard about bitisland? Its Bali bitcoin island project, this is not product like Microsoft or IBM. But you can buy share.
Counterparty have an unique assets you can buy too, usually they use Havelock investment.