Putin believes cryptocurrencies have the right to exist and may be used as a means of payment. However, there is no support for them as of yet, suggesting that these need to be regulated first. With the current economic restrictions dictated by the U.S., Russia is forced to move away from dollar-backed oil contracts. Putin is considering other currencies for oil trades, but cryptos are off the table for the time being.
https://www.notebookcheck.net/Vladimir-Putin-sees-value-in-cryptocurrencies-but-it-is-too-early-to-consider-crypto-backed-oil-trades.572910.0.html