Three things about the petro.
1.- It was first launched on march. The president Nicolás Maduro said in that occasion that was a success, but anybody in Venezuela had seen the money neither the petro. Maduro government is characterized for lying.
2.- Poor people in Venezuela is suffering because the hyperinflation. Petro don't solve it.
3.- Maduro's government is one of most corrupt in the world (Don't belive me see Transparency International index) https://www.transparency.org/news/feature/corruption_perceptions_index_2017#regional
)
Bonus: Maduro said that the petro is already in "the six most important exchanges in the word". Have you see it in any of them?