Why Do People Call Spanish a “Dead End” Language?

I want my kids to learn a foregin language and Chinese seems to be the most practical because it is the language of an up and coming country that is driving for 1st world status. When I see the spanish language comments they call it a "dead end" language because it is for the laborer ( from nations going no where). The only reason you need to learn spanish in the US is because the people that speak it can't figure out the english language. I am teaching my kids Chinese. I mow my own grass and clean my own house and don't eat fast food so we don't need spanish. I am offended by all the stores that have english and spanish signs and will not shop at most of them..we speak english in the US...If I go to a foreign country I learn the language to survive.. Am I wrong?