He wants to stop the war between Russia and Ukraine to avoid continuing to spend money on Ukraine, and by forcing Ukraine to sign a mineral agreement, he aims to recover the money already spent. By not providing security assurances, he is trying to avoid further expenditures in the future. The desire for Canada, Greenland, and the Panama Canal is to control North America. Trump wants to create a North American defense perimeter, shrinking American power to North America, while letting Asia and Europe deal with their own conflicts. After all, the U.S. has historically risen amidst the wars in Asia and Europe. This is my speculation.