It is even in Russia's best interest to ne encouraged to diversify their economy before they simply run out of natural resources. If there is a steady decrease in the sale price of fossil fuels instead of a sudden one they will have more time to adapt right?
I don't think that's really a worry (running out of resources). Our deepest mines are a paltry 4km; forests can be managed. Oil, gas, and coal will eventually run out, but the prices will have by then have risen to the point that use at scale will be impractical.