Humans develop words for denominations if those denominations are meaningful in everyday life. A dollar is meaningful in everyday life. You can price a sandwich or a car in dollars. You cannot price anything in BTC. This is why we don' t have an official English term for 100,000 dollars. Or 100,000,000 dollars. In fact find me any other currency in the world that has a widely-known word for a denomination that is 100,000,000 times the value of another denomination it also has a word for. Not how the brain works, so why work against the brain?