It can be a reliable currency but just for facebook products. This will be look like their first online currency like the 'facebook credits'.
The question is: should I entrust my investments to this new cryptocurrency? My conclusion boils down to taking advantage of the launch to invest in other currencies as a small investment and then avoid using this new Facebook project because in my view if the security of our data was not safeguarded by the company imagine our bitcoin?
You are already in doubt of investing to their coin because if you are too confident and you are decided that this coin would bring something new to the crypto community, you won't ask. In the first day of its launch probably it will be on hype but after that, expect that it will be the same like any other project.