I think it's credible to be concerned about a government that is funded entirely based on fossil fuels, given the likelihood of electric vehicles and renewables / alternatives playing an increasing role in transportation and energy in the future.
Medium term, this is probably not an issue, IMHO. But the outlook could be grim if "peak oil" actually happens due to lack of demand, and no reform has happened. The Economist pointed out (https://www.economist.com/news/special-report/21738583-tradi...) that this already has happened in Venezuela (a very different situation than Wyoming in terms of government contract, of course, but one that shows the dangers of overreliance.)
Medium term, this is probably not an issue, IMHO. But the outlook could be grim if "peak oil" actually happens due to lack of demand, and no reform has happened. The Economist pointed out (https://www.economist.com/news/special-report/21738583-tradi...) that this already has happened in Venezuela (a very different situation than Wyoming in terms of government contract, of course, but one that shows the dangers of overreliance.)