FUR11, possible if we get new, new, new investments.
Nope, it's still impossible for a ponzi to last forever. This is basic math. The deficit gets larger and larger and larger until eventually the deficit gets to be larger then all of the money in the world. But realistically, once the deficit gets to be so large that it takes days/weeks/months for new deposits to get their money back, word will get out and nobody will invest any longer.
But, again, very simple math will show you that it is unsustainable in the long term. And the longer is goes, the more people who will end up losing money.