Because they have billions of users they can shovel straight in to them.

Of those two thousand coins 95% or more are copy and paste pieces of junk put together by morons or pump and dumpers. They amount to less than nothing. The vast majority will never have had more than a thousand or two users, or rather gamblers, in total.

JPM coin looks like it's going to be interbank so the public will never touch it, but Facebook can plug in nearly half the population of the planet. You don't think that's going to have a teensy effect on something?

I'd be curious to know how many Facebook users have no access to decent banking but it must be a significant percentage.