I will not deny the fact that the introduction of this Facebook coin or globalcoin and gpmcoin is going to affect cryptocurrency negative because they are trying to take us back to the centralized transactions type that bitcoin and blockchain technology is trying to abolish! However, I still believe that bitcoin will find it way out at the end.
I think the effect is neutral/positive.
It won't tempt anyone out of crypto who's already in it. It may open some minds that otherwise wouldn't have been opened and they'll give the real deal some thought.
The reason most people are in crypto is to make more dollars. That's not an option with this. There really isn't very much overlap at all.