Pre 1965 US mint silver coins. Maybe one of your best investments. Some of your savings should be stored in US minted silver change, available from coin dealers in various quantities, ie 100 oz silver or hundred dollar face value bags. Because of the recognition and denomination sizes (dimes, quarters and half dollars) they are better than 1 oz American Eagle Silver coins for your smaller day to day retail business transactions--should the need arise.
The dime coin has been in circulation since 1796. Dimes made before 1964 have a base value of the current price of silver. The most valuable dimes are measured by such standards as condition, rarity and date of the coins, and can be worth in excess of $2 million.