President Putin has made it very clear that Russia's de-dollarization will start in the oil and gas sector. He was able to do this because of his power in the Russian government.
The next step will be for President Putin to take the helm of OPEC. This means he will have full control over all countries in the Middle East, including Iran and Saudi Arabia.
With this power, he could easily raise the price of oil around the world by increasing production by 8 million barrels per day (mbd). This will cause a global recession as it will reduce the demand for oil in the world.