I don’t think you can take current Hive/LEO earnings and multiply them by some future fiat price. A rising fiat price would have at least two effects. People here would probably on average use lower voting power. Folks who now give out 30% votes might shift to giving out 10% votes. And with a significantly higher fiat price for the tokens there would probably be many more active users so competition for those 10% upvotes would be strong.