Should I learn Russian or German?

I am an International Business student. I am fluent in Spanish and English.
I am wondering which would be the best career move, whether to learn Russian or German?
I am aware that German is an easier language to learn, and I have a German heritage, but perhaps Russian is more sought out in the business world.
I would appreciate your opinions in this matter.
Thank you.

Do you think the Russian language has a place in the business world?
The Russian economy has developed a lot within the last couple of years, mainly because of the petroleum and the natural gas. However, there is still a lot of corruption and I believe they'll have hardships (the Georgia conflict didn't help them) economically and politically.
Everybody speaks English nowadays, but it seems that the Russians aren't that eager to learn it.