I’m not sure if, economically speaking, it makes a difference whether we all have nice, high-paying jobs with much higher prices for the things we purchase or lower-paying jobs with cheaper prices at the store. However, one things certain, if the US was ever successfully blockaded (which may only require a threat) then this entire nation would quickly begin to look like New Orleans in the aftermath of Hurricane Katrina.
You are kidding right?
Name any 5 nations put together that would have the Naval capacity to "successfully blockade" the U.S....