The strong dollar is powering the US economy ahead while most of the world is struggling to stay above water. Americans gained roughly 20-25% in purchasing power against the rest of the world in just the last 18 months. US households have paid down a vast amount of debt in five years, significantly improving their debt to income ratio (while much of the world has done the opposite). Full-time job openings are at 15 year highs. The US share of all global wealth remains above 45%. The US median income remains among the highest of any nation, with no indication of erosion inbound. US economic competitiveness is among the highest, and total US manufacturing output is the highest it has ever been. Economically the US has been persistently getting better the last three to four years. The US is also about to enter a significant wage increase cycle that will see the standard of living move upward for the first time since the late 1990s.
By comparison, China is a disaster; Japan is stuck in the same hole it has been in for 25 years with 'deflation' (debt) continuing to eat away at their economy; Europe hasn't seen net GDP expansion since roughly 2007, with the Eurozone having twice the unemployment rate of the US, and with the Eurozone QE program failing to boost growth meaningfully.
Further, US neighbors Canada and Mexico both have done tremendously well over the last decade and will continue to, which will act as a multiplier for the US economy.