Lets say you own 25,000 shares of GE, 15,000 shares of PG The US government collapses and dollar is worthless. Do shares become worthless? or the HQs move to switzerland etc.. and factories since most are in china/mexico that your stock ownership is still good? since the US is gone does not mean private companies will not? So if you just have the share certificates in suitcase and move out to europe all is good?