Of course, data confidentiality should come first for any company. But what do we see in reality? Mobile operators sell databases, sometimes it seems that even banks spread information about the contact information of their users. If Facebook adapts cryptocurrency payments, it will only help its rating. There previously were much info that Facebook confidentiality = zero, everyone can buy user's password, what r we gonna see if they launch crypto payment?
It's still in the planning stage we'll see after they launch their coins we will analyze and give opinions on what they are going to offer tot he table, but right now we can only speculate on what they can give us because of our experiences using their platform.