Don’t oversell it: this is a government with advanced internet monitoring capabilities and little concern about civil liberties. Make one opsec mistake or transact with someone who does, show unexplained money, etc. and then it’s “turn over the key if you want to see your children out of prison”. Blockchains are exceptionally risky here because they require a lot of visible network activity and leave a full history of your activity for the authorities.
And they can skim off the top of all Russians at once. Even bitcoin is a pretty uncontestable step up - fiat currencies are bad for storing wealth at the best of times but this is really not the best of times. This is the time to flee a sinking ship.
I doubt that a government who pioneered cyberwarfare will be unable to locate your bitcoins; and once you do that, to acquire them they only need some goon with a monkeywrench - of which, I'm sure, there is no scarcity in Russia right now.
What ordinary people desperately need is assets they can hide from their government to preserve some wealth. However, because it is 2022, they also have the option of assets that literally nobody can take off them. It'd be worth a shot, maybe the legal situation will be different in 5-10 years and if they invest in a crypto they'll be able to trade it for something.
I like their odds in literally anything more than odds in the Russian rouble. So crypto would make sense.