 When they put central bank digital currency in, they could stop you. The answer to that was, well, I'll leave this restaurant, Subway, and then I'll go to Taco Bell and I'll get another 16-ounce soda. Then I'll leave Taco Bell and I'll go to KFC and get a third 16-ounce soda. Well, here's the problem. If central bank digital currency is your only form of money, they'll keep track and they'll know which restaurants you've been to. So you're literally relegated to 16-ounce soda.