Facebook will develop his blockchain technology!
The news appeared in many high-tech news sites such as TheVerge and recode : https://www.recode.net/2018/5/8/17329696/facebook-blockchain-crypocurrency-david-marcus-crypto-messenger-app
It seems that a dedicated team lead by David Marcus is ready.
What this would mean for cryptocurrency-based social networks like Steemit for example is still not yet clear !!?!