Silver prices in 1970 went from just $1.29 per ounce to it's peak of $49.45 per ounce in 1980 in a mere ten years giving a whooping gain of 3,773%. Always remember the saying; "Never put your all eggs in one basket." In other words, use different baskets to put your ova. During times of crisis period, where stock financial markets are down, the gold price goes utility.
The gold price performance incorporates a history way back to the general stock market. Now, gold and silver respond to almost the same fundamentals. Your own choose order physical gold, of which coins and acquiring gold bullion are the most typical. The idea you can roll over CME contracts indefinitely is an element of the problem, naturally.