I am also interested in Facebook coins but that is only limited to discourse and I think this will add to the confidence in the crypto world, maybe it is still long enough to be traded.
Choose bitcoin if you are a trader, FB coin is stable coin which mean you will get a small profit from it because the price movement is slow rather than bitcoin unless you will use it as trading pair. I got weird when many people have a same thing to wait this coin will be listed on an exchange or even there is someone who say that many investors out there who has interested to this coin. Because it's stable coin and not deserve to be choose as investment place.