I don't think anyone is surprise with the way big companies warm their heart to this project, Facebook is a huge success and if you look at what they have done with Instagram and Whatsapp, you would understand that they know well how to build a products, but can it compete well with BTC and do the market trust it, time will tell
If bitcoin recognized as digital asset not a currency, i think facebook coin can be success. Its hard to compete bitcoin right now because its too powerful and to gain trust like bitcoin did, but facebook is big company with billions market cap value and used by most people in the world, i think facebook can be a good investment if it launch