Why did silver decide to ally himself to Jim?

Silver decided to ally himself with Jim because he recognized Jim's potential as a leader and his resourcefulness, which could be beneficial for their mutual survival and ambitions. Additionally, Silver saw an opportunity to manipulate the situation to his advantage, as aligning with Jim would help him secure his own position among the crew. Their alliance also stemmed from a shared interest in navigating the treachery of the pirate world and achieving their goals together.