Why Gold?
In 1913, an ounce of gold was about $19 an ounce, about the same as an average mortgage (a different discussion). So…in 1913 your great grandpa put an oz of gold in an envelope. He also put a $20 bill in another envelope. He labeled both with "to my youngest heir, do not open until 2019). If you were one of two youngest heirs, which envelope would you want? Intrinsic value.