Facebook has officially ban ICO or anything related to crypto advertisement. What will happen? Nothing, they can still promote their ICO to other social media sites, or even in other crypto related websites.

Mark Z. goals is to prevent facebook users from investing on ICO scams. But this is not a direct attack to bitcoin or crypto itself. I also don't think it will negatively affect the price as well. The current price dip has something to do with India's news that they are regulating crypto.