If keeping it in cash was not an option, then I would use any unspent amounts to purchase pre-1965 U.S. coins, often called "junk silver." Pre-1965 coins are 90% silver. A bag with coins having a face value of $1,000 is the standard size sold and would probably cost about $12K right now.

Otherwise, a pre-1974 pickup truck and parts would be high on my wish list.