You can call me old fashioned but the more there is a person or reputable company associated with an investment the better. If there was a complete melt down of the the US financial system then I think the following the would be the safest to least safe. Feel free to challenge me!
Physical gold as in coins and bars.
Currency - what country?
Share certificates as in the actual paper certs.
Mutual funds with good companies such as Fidelity, Vanguard etc
Index funds not so much because if there was a meltdown then the underlying investments are not readily identified.
As the above mentioned I would own Apple only in a mutual fund. Too risky otherwise. If you look at the various mutual funds and see what they have invested in I think that would give an idea of solid safe stocks. I am getting away from picking individual stocks. I leave it to the professionals.....G