First, two paragraphs of background on Trump's biggest financial con job, his three casino hotels in Atlantic City, New Jersey:
On October 10, 2016, the Trump Taj Mahal, a hotel and casino in Atlantic City, New Jersey, permanently closed. It was one of three hotels that Donald Trump had built in Atlantic City, and each was done in the same way. Donald Trump would give talks to potential investors about how the huge sums of money that could be made in a hotel with a casino, investors would invest, and the hotel would be built. After the hotel was built, Donald Trump would take his cut, say 25 million dollars for putting the hotel deal together, Trump would also be issued stock in the hotel, and he would quietly sell his stock in the hotel say one to three years later.
Donald Trump cared not one bit if the hotel made money because his goal was to make money through his cut and the sale of hotel shares issued to him. Each hotel eventually collapsed because they were built in the already saturated Atlantic City casino market, because the hotels were not built economically, and because the hotels were built partially using bank loans which required interest to be replayed which put each hotel further and further into debt.
Donald Trump is now trying to sell everyone his shiny new agreement with North Korea, which North Korea agreed to because it cost them nothing. Sure, North Korea promised to completely denuclearize but they have been making that same agreement repeatedly in other agreements for the past 30 years. North Korea has no more intention to do it now than they have in the past. And since the agreement has no timeline for North Korea to disarm, and no specifics on inspections to verify what they did, no one can say a month or two from now that they are not complying.
All Donald Trump agreed to was to temporarily stop the military exercises in South Korea. Now, since South Korea has one or two of those occur every year, it will be very easy to see if Donald Trump eventually breaks his promise on the military exercises. However, Trump is not worried about that either because the purpose of this agreement is to try and make him look good before the midterms. Sometime after the midterms, when it is obvious that this agreement is not worth the paper it was written on, the Trump Administration will blame the North Koreans for noncompliance—which Trump fully expected would never happen—and that will be that.