They can, but the system is for all purposes death, Maduro believed that he could get away with USA sanctions using the Petro but the God Emperor slapped him with a Executive order, now no one care about it, the only thing that they released recently was the wallet but again you have to dox yourself to death to get it they did this to prevent people for using it to leave the country, it his rumoured that if you try to buy the petro and you are in the shit list your passport get blacklisted and calified as "stolen" so you have to wait shitload of months just to prove that isnt then another shitload of months to get a new one
Update: lets add that the minimum ammount of petros you can buy is
1000 euros , the minimum wage is 4 euros, so much for the crypto of the people (the thing is expressed in Euros and Yuans because maduro has a hateboner for USA to the point that he refuse to mention Dollars for anything)