He probably has an exit plan in the back of his mind, he has enough money stashed away to live in comfort in some country that doesn’t have an extradition treaty with the USA.
If he did switch sides and end the war with a deal with Russia, some type of accident or missile strike would likely take him out, with the blame placed on Russia.
When you have embarrassed The Family at the City of London there is no place on earth you can hide. Epstein found that out.