Global earth net worth target is $629 trillion by 2027. According to UBS.

1,000,000,000,000 = trillion

629,000,000,000,000 = $629 trillions

21000000*100000000 = max sats

629000000000000 / (21000000*100000000) = $0.2995238095238095238095238095

or $0.30 for 1 sat

or $30M for 1BTC

if everyone moves into using bitcoin by that date.