Thus predicted foreign policy "expert" George Friedman in 2015, during a speech to the Chicago Council on Global Affairs. The speech is here, and the segment where he talks about Russia's future begins at 48:12.
Friedman said that low oil prices and the shrinkage of its working-age population would hurt the Russian economy so badly that the country would start disintegrating "around 2020" but probably earlier. He reiterated this by saying "The Russians may be toast [by 2018-19]."
Friedman was right that oil prices would stay low for the foreseeable future: It was about $50/barrel when he gave the speech and it mostly stayed within +/- $10 of that point for the next five years (before recently crashing due to the pandemic). However, Russia did not disintegrate. It didn't lose control over even the smallest patch of territory, nor does it look poised to do so.
Putin remains a popular leader, and recent changes to the Russian constitution will make him President for life.
I think the important takeaway is that the Russians are more resilient and Putin is more powerful than Westerners would like to believe. The U.S. is actually in a state of greater domestic upheaval than Russia right now. The other important takeaway is that many lauded experts have undeserved reputations for being good prognosticators of the future events. In the same Chicago Council speech, Friedman also wrongly predicted that Greece would default on its debts to its international creditors and leave the Eurozone. In 1991, he also wrongly predicted that the U.S. and Japan were headed for war within 20 years.