And it would be a bad move to have the meeting on the peninsular as it would be seen as Trump cowing to Korea, instead of the other way around, rather like I thought Mays trip to the EU for the Brexit talks was, you're playing in their patch, not the other way round and that has a strong phycological effect.
I tend to agree, the little one is playing for time and monies, the same as the Olympic participation was. He might be at an impass in his rocket development, what better time to play the "good guy" on the world stage while research carries on, with the chance he may get some sanctions lifted or aid.