XRP can be transacted now without internet. The Chinese YUAN can too.
How to send them without internet? I doubt it, I think the only way to transfer coins is through internet. Even if it can be done without internet, I am not sure it will be as easy as with internet. So, we still have a big problem if there will be no internet. We also don't have a live crypto market (exchanges) if there will be no longer internet in the world.
He might talk about becoming fiat or paper note/bond since those two were centralized af in crypto so the owner behind it can try something like start to print their own money and use it without the internet. Basically, if the internet goes down, we have to back to the old ways, trade, and barter, using notes and papers.