Petro currency is a joke, with whitepaper full of inconsistencies and turned out to be a clone of the Dash cryptocurrency.

The populist - socialist party with ties to Maduro tried to introduce a similar project in Ecuador. Thankfully, the masses said "no way". The problem here is not crypto, but the quality and honesty (or lack of) of the governments (whether they want to promote their own shady crypto-project, or ban/talk bad of crypto in general to protect their own interests)