Found $873K, need help investing it

[Jim K.]

Bought a teardown at a tax auction, went in and knocked a hole in one of the kitchen walls, found three stud bays filled with plastic-wrapped used bills, mostly twenties but lots of fifties, hundreds. $873K total. There was a Glock lying on top of one of the stacks, bit rusted, been there a while.

How should I invest this money? Please help. I'm so confused.