Cryptocurrencies can be decentralized but centralized exchanges and centralized wallets are not decentralized, only centralized exchanges and wallets is what I are talking about. For people that are using decentralized wallets, there is nothing because the have the control, not the exchanges. But Russians can turn to decentralized means though.
Even from Binance CEO Changpeng Zhao himself saying that cryptocurrencies won’t help evade sanctions.
But from my own perspective, Russia can possibly evade sanctions if they turn towards full decentralization or exchanges refuse to ban Russians from using their respective platforms. Like for instance, mandating all businesses to accept crypto payments by using non-custodial wallets.