Highly unlikely. There is a whole list of reasons why Petro won't be Venezuela's economical salvation but the the short and easy answer is that -
Petro is just another centralized cryptocurrency. The government that has failed to hold the economy together in a traditional system is likely to repeat the pattern of failure in a digital system. I am basing this argument on their past record.
From the very beginning the idea of Petro has been a way to circumvent the US sanctions. I am not saying that Venezuela shouldn't fight back for their right, what I am saying is that from the very beginning the intention of the Venezuelan government has been to use Petro as mere means of gathering financial support. In reality they should have let petro be a decentralized project backed by the people of Venezuela directly and not through a government proxy. This way the benefits would have belonged to the people directly.