Why is USD the societal “standard” for currency?

Question

I understand the United States’ role in the global economy, with the Intranet origin being a US Govt. project. But still, why is this the standard? Is it just culture being the answer?

(100% willing to accept DMs that are not ELI5ed)

In: 3

Answer 1

If a price is not in your own currency, you have to calculate with the exchange rate, how much it is in your country.

Some people can do this simple math, some cannot.

So it is most convinient for all to use the currency of thouse, that cannot do the simple math, so everyone can still understand the price.