There is no End Game. The world is getting more and more wealthy since the beginning of capitalism.
If it would get really bad (new 2008 recession) the EZB / FED could just buy all the federal government debt in a new massive quantitative easing program.
In the long term equities are the safest place to be. This are stocks and real estate in countries with a positive population and economy growth.
Compared to Europa the US is currently a very good place to be. Some Asian countries which still have strong growth, currently have a low stock market valuation
The US stock market currently has a high valuation but compared to the non existing real yield on government bonds the valuations are low.
I own a mixture of US Stocks (Index+ single), Singapore and Hong Kong stock ETF, US REIT Funds and a few single Reits. (plus Lending Club and Limited Partnership investments). Everything is fine. My wealth is safe and in the long term will grow. Dividend flow is strong.
The worst place to keep your net worth long term is cash and government bonds.
Historically government debt holder always got screwed in times of massive debt.
The US or major EU nations will never declare bankruptcy The central banks will just buy their debt. (so screwing cash and debt holders)