why does anyone measure btc in usd ?

when btc has absolutely nothing to do with the usa and usd.

it was not invented in the usa and the usd is fake money.

in half decent, half fake money btc made only 25% in 4 years, much less than inflation in 4 years.

1921 btc was worth 60k

today it is worth 75k

within the last year it has lost value massively.