Goodness, I thought I was alone in my madness.
Once when going on a week's vacation, I worried about an expensive set of tableware my DH's mother had just given us. So I put it in a very good hiding place, never to be seen again for a couple of years. One day while cleaning the sofa I stuck my hand down between the back of it and the arms, found all my good silver!! It really was a good hiding place.
And when a dear SIL died, her kids sold a lot of her stuff but I had to stop the oldest girl from dumping her Mom's sewing machine.
I had seen her put money in the little part that fits onto the left side of the machine!!! They found quite a little bundle of cash there, and I had them keep the machine for their own daughters.