I am yet to see a single hint of positive approach towards cryptocurrency from Zuckerberg. He seems to hate Bitcoin with a passion, and I don't know exactly the reason for that. There are rumors that the hatred results from the involvement of the Winklewii in Bitcoin sector. He once tried to destroy Bitcoin by coming up with his own version of shitcoin (called Libra). But that plan flopped miserably even before it could be finalized. And actually this might have ignited his hatred even further.