I'm not made of money
No, but you've got lots of it in da bank!!
An excellent example of how da saying "I'm not made of money" can be very deceptive (i.e., da speaker is actually "loaded") would be Ethan Couch's infamous "affluenza" defense --- he never claimed dat he or any of his family-members were actually constructed of hundred-dollar bills, but he was still indirectly bragging about how wealthy they were.