Zero percent market share [ https://p.feedblitz.com/r3.asp?l=181418060&f=1081591&c=7969024&u=5102652 ]
If you have a million Twitter followers, that means that 99.9% of the people on Twitter are ignoring you, which, with a little rounding, means you have 0%.
If you write a book and it sells a million copies, it will be one of the bestselling books of the year. It will also reach far fewer than 1% of the country’s population, never mind the world.
There are very few things that ever rise to 1% of the market. Not only don’t you need everyone, the act of chasing everyone is probably keeping you from reaching anyone.