Paper dollar bills worth in the range of $2-3 million. No purpose to them except aesthetics or impressing your friends with your taste in “finer” things. If you are looking for irrational exuberance, you will find it in auctions where old stuff is sold.
Dumping $2-3m on something fragile and pretty useless such as old money is perhaps the most insane thing I have heard.
I know, I know… people attach sentimental value to these “rare” pieces of history, but I don’t think they are really worth that much.
Now compare that to Cardano—something with actual utility and it’s future potential.