The question is about life savings. This answer isn't about life savings.
The best investment as life savings protection for the future in the U.S. is, fertile land with water, where the patent has been "updated" to show you as the owner. Other than that, gold, silver, copper and Bitcoin.
Even though there is inflation, keep a chunk of cash around, hidden of course, in one's, five's, and ten's - maybe include some twenty's - because when the crash comes, you will be able to transact life if you have cash. Bitcoin may collapse due to the delicacy of the power grid and Internet, and it will take people awhile to get used to trading in gold and silver again.
For a time, cash dollars will be king when the crash comes.
When the crash does come, the dollars should be exchanged for food (something which preferably doesn't perish easily).
Food will be the first commodity that shoots up in price.
