Yes.
It is possible to 1:1 map all dollar bills to all the twenties without ever exhausting the supply of either so this is a countably infinite collection. (Mathematicians call this “bijection.” because they watched too much sf I think.)
Means it is ℵ0. Multiply that puppy by any real finite number and you get ℵ0 all over again.
This is the most common infinity people talk about, and the “intuitive” one. But there are others. The uncountable infinities where the Old Ones live.
Best not to think about those for now. Might hurt your brain. Or summon Yog-Sothoth.