There is no evidence — reliable, speculative, or otherwise — that suggests Nicolás Maduro's net worth exceeds even $100 billion. It's more likely in the hundreds of millions, not hundreds of billions.
Even the most aggressive speculative estimates from opposition figures, investigative journalists, or geopolitical analysts do not approach that figure.
No credible leaks (like the Panama Papers or Pandora Papers) have hinted at such vast assets tied to Maduro.
No intelligence reports or financial investigations from entities like the U.S. Treasury, the EU, or independent watchdogs have ever approached figures remotely close to hundreds of billions.
OP's point is that Maduro's authority over the whole country effectively grants him control over the resources and the corresponding net worth. It's a stretch but I can see where they are coming from.
What individual(s)? You just mentioned a family and not an individual. Forbes lists Elon's net worth at $419 billion.