Russia will run out of cash on hand before it runs out of money. Their central bank will be likely unable to prevent currency devaluations, making things worse . Putin will enlist Trump to help him obtain a cease fire will maintaining maximalist demands. Europe will have to push back hard on Trump.
Btw I hateTrump for MANY reasons including his Putin glazing & hostility towards Ukraine, but 1 thing done right (to help his terrible public opinion, not to help Ukraine) has been to keep oil prices down. This keeps Russian revenue from increasing. Thank god for that unintentional help from DJT lol