[whd23]

In my humble opinion if you aren’t learning C# (c-sharp) or Java you are wasting your time. Most all new development (including phone apps) are done in one of these 2.

You realize that without 'C', assembler, and Forth there wouldn't be any OS for C# or Java to execute on, right?

[LivingNet]

Yes...
I took his question to be which language would give him the best and most new job prospects, not which one would allow him to win the Nerd of the Year contest.