Doesn’t matter. Rebellion would happen in a different way. As somebody said up-thread, people would cash out their 401(k)s and other IRAs and take the IRS penalty. I know I would, given that Obamao would try to do it by EO if Congress doesn’t comply.
Most likely, cashing out will do no good. An announcement will be made that US dollars are being phased out. You will receive one North American Dinero for every 10 US dollars you turn in.