Although the US dollar is now a strong coin, it does not mean that the US dollar will continue to be strong in the future. It is an unequal performance to know that the US dollar is compressing the world's economies. Humans need real free trade to develop better.
Of course it cannot stay strong forever. The strength is primarily determined by the demand for the dollar and this will break if China and Russia completely diverted their trading medium from Dollars to their own currency.