I agree there could be some opportunities of a lifetime, but it isnt worth more than taking a very small portion of ones portfolio to invest longterm due to the risk involved. Plus, as I stated previously, regardless of how great and legit one may be, they will either say screw these investors and not do anything and/or will try to go private, which yes it provides upside with that, but severely minimizes the upside and thus makes it even that much more difficult to take the risk. I dont know if I ever see any large firm such as GS and MS covering any of these stocks and that will be the only way for any of them to get a true valuation.