First of all, welcome to the board. You will find a lot of support and advice here. As for your issue..............this is pretty common around here. For me personally, I don't think my difficult child has stolen more than change out of my purse, but I know it's happened to a lot of parents here. Basically you only have a couple of options. For the card, you can get a new pin number. Otherwise, it sounds like it's time to start (literally) locking up your purse and anyone else's purse/wallet who lives in the household. For my son, he prefers to take "things"....of course we never usually have cash in the house. Nothing to do with him, just how it works out. We now have a deadbolt on our bedroom door (key lock door knobs are too easy to break into) and our garage is always padlocked so difficult child can't get at tools and stuff that's stored in the attic. It's rotten that we have to live like that but as long as he's in our house, that's our reality.
Something else to think about with your difficult child is pressing charges. As parents, we don't want to see our kids in trouble or in jail but if confronting him on it hasn't changed things, you may have to think about taking that next step. You may not be able to prove that he took cash from your purse but the ATM machines have camera's that record all transactions. Sometimes it is the only thing that get's through to them. (and sometimes even that doesn't do it) But at the same time, if he did it to someone else, most people would press charges and it's a natural consequence of his actions. It's your decision of course but if this has happened repeatedly, in my humble opinion, I would have to at least consider it, if it were me.