It's better if you dont ask!
I don't believe that Linus ever asked (someone else) if he should learn C. Or that Damien Katz (couchdb creator) ever asked if he should learn Erlang. Or if Brad Fitzpatrick (Livejournal & Danga) ever asked if he should learn Perl!
Just learn what you (from looking around) believe will make you a better or smarter, what is even more important use what you learn. Don't just learn to learn!