Almost every socialist government in history has fallen. As a system, collapse has always been inevitable. It is not that socialism is bad in theory- indeed in theory it works perfectly. But in practice, the implementation of socialism requires a government so big that its corruption is almost impossible to stop.
Venezuela should be one of the richest countries in the world. But instead it and it's people suffers needlessly under a government that does not have their best interests at heart. The poor, who were supposed to be helped, cannot even buy bread and toilet roll in their government run shops. They are murdered on the street in a country with one of the highest murder rates in the ENTIRE WORLD. I'm not saying it was much better before, but Chavez's brand of nationalism, anti-imperialism and Marxism led the country down a bad path. This was inevitable.
Nevertheless, due to the massive propaganda and coercion of the workforce (especially those who work for the government) and the opposition, who still suffer from their decade-old coup attempt, it is unlikely the government will fall this time. But just as the sun rises in the morning and the days get longer in Spring, it is inevitable.
There's an economic theory known as the 'resource curse' which argues that countries which rely on one natural resource, such as oil, are doomed to have economic problems.