My grandfather had an account he never told my grandmother about, then he got dementia and couldn't remember he had the account, years later after he died we found out about it, and we found out that he'd invested in a lot of successful companies over the decades, and had made a substantial amount of money.

If my grandmother had known about the account he would have had vastly better care than we were actually able to afford.

I also think it's rather ironic that he would have had a better life if he had just been a bit more open with his finances.

Growing up they always had crap cars they were always falling apart and Mr Frugal was sitting on a life-changing amount of money.