There are some reactor designs that run on waste of standard reactors. It would solve two of your points for at least some decades.

You could actually break bitcoin with enough computing power. Bitcoin works on the fact that most of the miners are honest. Someone with enough processing power could rewrite the Blockchain as they want.

FYI America is not the only country Italians live in. They also populate a whole country on the other side of the world. The Italian Americans that colonized this country called it Italy and named themselves “Italians” (without “American”, I know, it’s crazy!).