I'm a bitcoin-assets guy, because that's where people that know what's going on in the bitcoin space hang out. That said, I don't currently own shares in any MPEX listed security, nor any other bitcoin denominated security. I don't like the counterparty risk associated with virtual shares in virtual companies in a virtual world now that bitcoins have tremendous fiat value. Everyone is a hustler in the bitcoin space (much like the general financial services space), and its hard to avoid getting burned at least once, particularly since getting legal relief is usually impossible.  10BTC is a small price to pay to learn this lesson, relative to what others have paid in the past (myself included).

Good luck collecting on your non-currency based gambling transaction with a virtual company run out of deep eastern Europe.