You should ask the people who became Inheritor 3 months after they added Inheritor. (There was the one group of people who glitched it to bosst to Inheritor on week one, but they got banned I believe). It's quite easy to hit your cap every day if you play Firefight. I used to get about 10k cR every 15 or so minutes. In an hour that's 40k, in 5 hours that's your cap (I never had homework, so I would play the moment I got home from school until 10 at night). I only ever reached Reclaimer though I think. Only needed about 2 million to get to Inheritor, would have only taken me 10 days, but I lost interest.