0710 GMT - Bitcoin rises as risk sentiment improves on hopes for diplomacy in the Middle East conflict. President Trump said on Tuesday that U.S. officials had a "very good meeting" with Iran on the sidelines of the United Nations General Assembly in New York. Saudi Arabia, meanwhile, began running tests on its East-West pipeline on Tuesday in a step toward restoring flows as soon as this week after the pipeline was damaged by attacks earlier this month, the Wall Street Journal reports. Bitcoin rises 0.3% to $86,502, having reached its highest level since late January on Monday at $87,315, LSEG data show.