The fact of the matter is that Maduro has been trying to make Petro sound like a nationalistic version of bitcoin, which it is really not. It is centralized, it's not a store of value, and it's completely impractical.
Though there are no guarantees. Even if he may be supportive of bitcoin doesn't mean that changes will be made to push bitcoin adoption and regulation to create an incentivized environment for bitcoin businesses or bitcoin acceptance, though that would be the logical thing to do given the state of Venezuela's own currency and economy.
Yep. They say it's backed by oil, but it's really not since IIRC it's impractical to extract that oil from the ground. So essentially, it's no different to Bolivars, except the government also gets foreign funding from this.