Why is this so unexpected  

Pope Francais is the most technologically savvy in the religious monarchy ever having a twitter account and Instagram that he frequently uses.
He is trying to appeal to the younger generation yet stay humble, so he does not over do it like the British monarchy does.
This was bound to happen as this means more donations to the church, going to the poor of course  .

IDK, the article cites an established CEO of an italian BTC startup as a source. normally, yeah, but I doub't he'd be retweeting it like crazy if it were bunk

Absolutely ... it's a non-sense for a certain point of view that they approach cryptocurrency.
A nice april fools but I have to admit I click on url link and yes seems to be a real a news

Yes, I agree.  There have been quite a few gags today, but this one is pretty weak...It's mostly weak because there have been so many other gags today.  The gags are gonna have to get better and better as the day progresses for them to be convincing.  I was had a few times earlier but I'm not falling for them anymore.  I'm pretty sure the Vatican already has a blockchain technology anyway!

It might be to make us fool. Really if its true it would benefit Vatican in getting more donations. People look for a source through which donations can be made easy. If someone holding large amount of bitcoin wish to donate, he doesn't need to depend on fiat.