I think that Trump, by not being 'quiet', is the motivation for the sanctions to have an effect. Who can predict what either leader will do. The entire world now has a stake in this matter. Prior administrations didn't want to deal with this nut and it is now Trumps duty to defend our country against all threats.
Trump has had the courtesy to learn the language of his enemy. It has proven to be an effective tool.
NK has paid billions to produce their weapons systems. If sanctions are allowed to work. NK will have no tools to fight the sanctions. They want to use their weapons to get the US to act or give them money. But we need to keep the pressure on while keeping military clashes out of it. NK is losing money every day the sanctions are on, and they need cash to import food and other resources.