You might want to look into investing in silver and silver coins as they can be used to buy food, gasoline and more if the economy crashes completely.
Silver is relatively inexpensive and overall a fairly safe investment.
The price changes daily, but typically holds its value steady.
Currently you can purchase silver for approximately $18-$20 an ounce as compared to gold currently worth approximately $1100 per ounce.
Some of the coins still circulated around today that are silver (90%) are the old Roosevelt dimes, the silver dollar and the standing liberty quarter.
Years ago, silver dollars were used as prizes and if you were lucky to have received one, they are very valuable today.
Something to consider with silver coins as well is they could be really easy to use to pay for goods whereas gold would be difficult when buying smaller items as you wouldn't be able to get change and would have to sacrifice a very valuable item.
So if the economy crashes, the coins will work quite nicely for this purpose.
Some people invest in bulk silver which means having numerous pieces of silver or a bag of many coins; others like the trading and buying of coins as they can be somewhat fun to collect as well as provide a safety net.
Another alternative is silver bars that come in small sizes of less than one ounce as well as large bars depending on the investment you wish to make.
One fact you should know concerning silver is that is not 100% silver.
The reason for this is silver in its purest form would be too soft.
So if you are looking for some investment protection, silver may be your answer as it will always have a value when currency may not.