Even though we will still use money, one thing that has been used less and less over the years is cash. Keeping up with that trend, cash will most likely no longer be used in 2050. All transactions will be done virtually, and new modes of financial transactions will emerge because of AI and decentralized finance. As the world slowly starts to adopt those technologies, we may not even have to do our own grocery shopping anymore, making traditional paper and plastic money even less useful. Like Tesla, which orders its own car parts as needed, our automated pantries and refrigerators may order our groceries, no more getting the wrong milk, or even running out of milk.