I was thinking about this more and more lately. There is really no escaping this , because even if you are sensible in your choices your vendor or service provider may not be. It will introduce a new level of randomness to our interactions that as a society we may not be quite ready for.
From the more obvious possible issues: no payroll, massive refund overpayment, legally binding agreement that puts the business at disadvantage.
FWIW, I like the idea, but I sure as fuck would not let LLM touch real money or pieces that can allow to move it around.