While I get your point, that is why a few of us prefer using Exchange Traded Funds with AIM. They are unlikely to go to zero. Even if they close a fund, you can switch to another fund without skipping a beat.
WHY PICK ON AN ENRON. The idea is to avoid an Enron when you are long. Show me a short who think Enron collapse was bad. Being on the right side in this man made repetitive business is the thing.