Hmmmm.......I would guess that about 95% of Americans must not be "surviving life", according to your standard.
My size is contingent on assessed risk and timeframe, which are in turn contingent on a whole bunch of other things... there is no set size...
If you are leaving in US, it might not be enough money, Eventough i do not think "most" of american can make more than $50,000 net after tax. Many part of the world, especialy where i live (south east asia) you can live very high standard life with $50k, that you can have with at least $200K if living in america.
Btw i lost money ($30K) last year on trading as a bignner, so If i am pluse $50K , why sould not be called "succuss" I bet that "half" the ET members , even not making any money at all, with most of them losing money.