Forever? Look at North Korea: Kim Jong-un is doing fine.
It's a fantasy that the "entire world" would sanction them: https://www.nytimes.com/2022/02/23/world/europe/china-russia...:
> China on Wednesday criticized the expansion of economic sanctions against Russia, saying that they were unlikely to solve the Ukraine crisis and that they had the potential to harm average people as well as the interests of Beijing.
Putin doesn't care about Russia economy the way you think he does: https://www.theatlantic.com/ideas/archive/2022/02/lavrov-rus...:
> Their intentions are different from ours too. Putin’s goal is not a flourishing, peaceful, prosperous Russia, but a Russia where he remains in charge. Lavrov’s goal is to maintain his position in the murky world of the Russian elite and, of course, to keep his money. What we mean by “interests” and what they mean by “interests” are not the same. When they listen to our diplomats, they don’t hear anything that really threatens their position, their power, their personal fortunes.
IIRC, Russia media is basically like having pro-Putin Tucker Carlson on all the channels all the time. And if, despite that, anyone in Russia has even a small chance of actually undermine Putin, they'll find poison in their underwear and get an all-expenses paid trip to a gulag.
This is bait and bad bait at that. The longer Russia continues to provide us with video evidence of their bullying only makes it easier for us to convince undecided countries to sanction Russia to submission.