I hope it's not the case, because if Western countries see that crypto currencies circumvent all the sanctions than we could face direct bans on cryptos even if we had nothing to do with the Russian sanctions. It would shed a bad light on cryptos again.
Also I think that cryptos are no real alternative for the swift system to save Russian banks. Most of the bank subsidiaries in Europe deal in Euros, so they still would need to aquire large amounts of foreign currencies, just against cryptos and not the ruble. And then there are the large amounts of western companies who are leaving the Russian market. Which is having a big impact, a lot of employees are losing there jobs. I am not sure if cryptos could help here, because if it comes public that one of the major companies circumventes the sanctions it could become a PR debacle and ruin the public image.