I'm very curios to learn more about technical details of this upcoming coin. I really doubt that any government in the world would issue a true, decentralized and permissionless cryptocurrency, so this Petro is most likely to be a payment system akin to PayPal. But it may not mean that it will fail immediately, because even today we have many centralized "cryptocurrencies" like Ripple and Iota and investors doesn't really seem to care about it as their marketcaps have grown past those of real cryptocurrencies like Litecoin or Monero.
this is to support or event substitute the hyperinflated bolivar
it is not going to be decentralised for sure,there is no point in issuing a currency if you do not control it
but the country does have oil to back it up,so it is not going to fail
I don't think there will be mining and block rewards,once again
since it defeats the purpose of controlling it and getting the all so needed money to stabilize the economy
lets wait for the launch and the whitepaper