"Do not love the world or anything in the world, if you love the world the love for The Father is not in you" John 2:15
I can't tell you how many crime related documentaries i've seen, where people are mindlessly killing each other, or doing other horrible things, all for what you ask? money, power, and other useless, saddening, ultimately unimportant things in this world...
Yes we need money to pay for bills etc...but it is in no way, shape, or form is it worth more than someones life nor is it anything other than a means to do things. It matters nothing compared to the Glory of God and His purpose for each individual.
So does believing in God diminish men and womens focus on things of this world? I sure hope so, because we're here for God, and my understanding is, what we do on this earth, the short time we're here, counts for all eternity. So hurting people or doing other evil things to acquire money, power etc...does nothing for anyone when we die. Nothing in a good way that is, but spending our time helping our fellow human being, clothing those who are naked, feeding those who are hungry, giving hope to those who have none(like people in jails), helping the sick, and the homeless, and of course giving all credit and praise to God for all our blessings and the ability to do any of this, ultimately doing The will of God, I'd imagine those things are truly beneficial for eternity.
I turned 26 this year, and I know I haven't done enough, I only pray I will before my time runs out and the things I do please The Lord in same way. Because His will is all that matters now and in the end.