There are already a huge number of such cryptocurrencies. There are already so many full-fledged blockchains that it is difficult to count them all. If someone needs inflationary cryptocurrencies, then they can either choose from this set or make their own as much as they want.

As for trillions, they are not going to buy bitcoins with all these trillions. If I go to a candy store with a thousand dollars of capital, it does not mean that I will spend more than a few dollars there.