I know this is the not the answer to the question but reminded me of a case I had a few years ago.
I am a Social Worker and we went out to assess an old man who was living on his own. He told me he kept his money in the cupboard and wanted me to help him so when I started counting it, there was over £50,000 in £10's and £20's. It was hidden everywhere in the flat - airing cupboard, under floorboards, everywhere we looked. It was amazing. Obv didn't keep it but still amazed me that people kept cash around like that. We even had to arrange for the men with the security van and masks etc to transfer the cash to the Council's bank acct until the man could open his own acct!