We need to be careful here.

FDIC has 100K limit (subject to change) on combined SSN/type...
In term of investing, I don't think there will be any guarantee, death benefit maybe. How much sense does it make, if DB is still there (but individual doesn't die) while all cash value evaporated?
So in reality we go to companies with financial strength, like AAA rating. But again, Lehman's papers and those Swap/原子弹 were also AAA.