We can clearly see that Maduros administration is working on ways to avoid sanctions and improve oil sector, so yeah, I believe we'll see the results sooner or later (better be sooner). Btw El Petro was created for this purpose, am I right?
That is one of the goals of course.
There are others. Petro is not as easy to manipulate towards the US dollar as the Bolivar (even if that will depend on how it will be received by the markets). And like most cryptos is an anti-inflationary currency, because the total number issued cannot change.