1. Pay all the mortgage.
2. Buy some stock shares that you are sure will go up again. I bet Microsoft, google, facebook, apple, etc. are safe bet
3. Buy some gold- make it count when it is cheaper. You know gold is gonna glitter pretty soon. Else just export it to India, they are always ready to buy tons of it.
4. Buy cryptocoins

But I see a very interesting and tricky future for cryptocurrency in the scenario you have described here. Trust on cash/gold based economy may plummet altogether and investment on cryptocurrency will jump over the roof. Even the ones who are slamming the crypto business will come aboard, thus legitimizing the aims/claims of crytpcurrencies.