After so many sanctions imposed by the UK and US, Russia had only the option of adopting cryptocurrency.
Why? To keep ruble exchange rate relatively stable they hardly would like to get new competitors for him. So there are much more options what to do and previously they didn't want to adopt decentralized currencies.
And as for bureaucratic elite they use cryptocurrencies like they like even without any official adoption, so they just don't really need any changes with that.
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I would have to guess that west would have a problem with that and could create some problems and tensions, but what are they going to do? Sanction another nation? It doesn't work as well as they imagined from what we have seen.
It's more complex. If we talk about gadgets then sanctions would work not so good, but if we talk about airplanes, gas turbines, trains and other technically sophisticated single devices then sanctions will probably work good enough.