I can`t agree with this idea, I think Russia`s economy is rather strong, as they feel good even with all those sanctions they got from the US and EU.
Nope, Russian Ruble is slowly inflating. The corruption in Putin's administration is the reason for that problem. The reason that they only get by is because they are a nuclear super power. Not to mention that Russia is weapons dealer too, they also have connections to oil barons in the Middle East and China's trade relations with them is what is keeping them alive, not to mention the cyber attacks conducted by their hackers are generating money for their country too. It only looks strong because people can't outright complain about something because they knew that Putin crushes everyone that tries to expose his propaganda campaign, if you believe otherwise, then how come he wants Navalny and many other Putin administration opposition arrested.
In Russia, there is a strong habit of denying reality and repeating many times, like a mantra, about its alleged greatness and wretchedness of all the rest, and especially the developed countries of the West. I was born when the USSR still existed, and I saw it all. At school I was told every day "the rotten west will soon collapse, who needs the US dollar or the Japanese yen, we are huge, and everyone wants our resources, but we will destroy everyone." And in reality, billions of rubles were invested in the military-industrial complex, and nothing for the people. The population was extremely poor, but everyone got used to endure and wait for the "collapse of imperialism." And then there was the war in Afghanistan and SANCTIONS. What is happening now in the Russian Federation is an accelerated scrolling of what happened before the collapse of the USSR.
PS. And Navalny has already been detained. The reason - "did not come to call the police" at the time when he was rescued in Charite from poisoning by Russian terrorists. Those. they knew that he was in a coma, in a hospital, in another country, but they sent him summons to come for interrogation ...