Many have noticed that BAWSAQ prices have not changed since July 15. Hopefully this is because Rockstar is working on something. But here's a possible risk: people have been buying and selling stocks for weeks with no changes to stock prices showing. If BAWSAQ unfreezes and suddenly "catches up" to all the trades that have taken place in the blind, there could be severe, sudden effects on Michael, Franklin, and Trevor's portfolios. A "market crash" seems likely, because anyone who sees this coming would have cashed out for safety. In real life when money flees a market it crashes and anybody who doesn't get out gets wiped out.
Now, maybe nothing will happen because BAWSAQ doesn't really work and Rockstar maybe will ignore all the trades made during the freeze. But if it worked legitimately there should be massive wealth destruction resulting from this malfunction.