[loewenskind]

What a useless point of view. English wont always be the dominant language. What will people like you do then?

Is everything a waste of time unless you can directly make money from it? Learning a language teaches you so many things. Things about your language, gives you insight into other cultures, etc., etc.

[pfedor]

You have only this many five-years projects left to complete in this life. If you really prefer learning a foreign language to learning quantum mechanics, or computer programming, or how to play a piano, by all means don't let me stop you.

[loewenskind]

You can do more than one at the same time. You can even learn more than one language at the same time so long as they're not too close to each other.