Exactly. Except I'd like to suggest one small correction: A multi coin world is about as likely as a multi internet world, with the added influence of financial incentives driving out any possibility of a separate coexisting internet. So it's not just "very unlikely"; in the long run, it's an absolute impossibility.

Another great resource for this is "Human Action" by Ludwig von Mises. And "The Bitcoin Standard" by Saifedean Ammous, of course.