https://www.reddit.com/r/Bitcoin/comments/7o3uk7/facebook_ceo_mark_zuckerberg_says_that_he_will/
Here's the main quotation from his post:
"There are important counter-trends to this --like encryption and cryptocurrency -- that take power from centralized systems and put it back into people's hands. But they come with the risk of being harder to control. I'm interested to go deeper and study the positive and negative aspects of these technologies, and how best to use them in our services. This will be a serious year of self-improvement and I'm looking forward to learning from working to fix our issues together." - Mark