Because banks are afraid that the next crude oil futures will fall to negative numbers.
At present, only Canada has imposed sanctions on potanin, prohibiting any Canadian citizen from trading with the sanctioned person to provide funds. Therefore, it is very likely that potanin will complete the transaction before the sanctions in other regions fall. Potanin was the first deputy prime minister of Russia from 1996 to 1997, and now he is the president of Norilsk Nickel Company, the largest nickel producer in the world, occupying the position of the richest man in Russia for a long time.