Yes, the U.S. has the worlds strongest military today. However, nothing is ever static. Warfare evolves quickly, and can render past strategies and weapons systems obsolete. Consider trench warfare, which was the most important tactic of World War I. The French dug massive trenches, and its Maginot line was considered a formidable defense against German aggression. When Germany attacked France in WWII, did it throw its troops into the meat grinder of trench warfare? No. Germany leveraged the growing sophistication of air power into its Blitzkrieg strategy, and easily crushed France in weeks.
We're seeing the same thing play out in Ukraine today. Russia went in with its "Special Military Operation" expecting to take Ukraine in days. Now, over 3 years later, Ukraine is still in the fight, and Russia is still expending resources trying to take Ukraine. Moreover, drone warfare has evolved at a rapid pace, and Ukraine has used sea-going drones to nullify Russia's Navy.
Yes, the U.S. has the most formidable military in the world, even given the recent changes in the way wars are fought. However, the assumption that the U.S. will remain able to dominate the world militarily indefinitely is dangerous. The manufacturing capacity of the U.S. is not nearly what it once was, and being able to crank out inexpensive drones is likely an area where China could outclass the U.S.. Moreover, if the U.S. continues along its path of bullying the world, it weakens its alliances and induces other countries to ally against it. Can the most powerful military in the world stand against the entire rest of the world fighting together? Further, one of Germany's biggest weaknesses was the leadership at the top. Having a narcissistic psychopath at the top that thinks they know everything is not conducive to effective military strategy, especially when they punish those who tell them what they don't want to hear. Trump is constantly shutting down dissenting voices, rather than listening to see if what they're saying has merit. When you surround yourself with yes-men, sooner or later your fantasy bubble runs into the cold, hard reality of the actual world around you.
Finally, you state that it's "only a matter of time until wherever you move is captured." This simply isn't true. There are lots of places in the world that don't hold significant resources and/or strategic value to make them worth expending resources on to capture and hold. The coming fight isn't going to be everywhere, all at once. There are many small, insignificant corners of the world where it will be relatively safe to live while the powers at odds fight it out.