I say to the boastful, 'Do not boast,' and to the wicked, 'Do not lift up your horn; do not lift up your horn on high, or speak with haughty neck.'" For not from the east or from the west and not from the wilderness comes lifting up, but it is God who executes judgment, putting down one and lifting up another. For in the hand of the Lord there is a cup with foaming wine, well mixed, and he pours out from it, and all the wicked of the earth shall drain it down to the dregs. But I will declare it forever; I will sing praises to the God of Jacob. All the horns of the wicked I will cut off, but the horns of the righteous shall be lifted up.
Asaph is identified as writing this Psalm and in it he quotes God. Although he does not say that it is God speaking it's obvious from what is being said. God says that even when the world is in chaos He's in control. He will not permit wickedness and arrogance.
Asaph starts the psalm with a statement of gratitude for deliverance. In His response God warns the wicked to stop arrogantly boasting because He is the one in control. He is the one that promotes and He is the one that demotes. He is the one who will dispense justice and that He will judge with equity, and He will do it in His time. This applies to our own individual circumstances today. While there are practical steps we can take to achieve advancement, promotions and leadership opportunities—be it at work, school, church or community—the most important strategy is to rely on God for His direction and help.
In the end the righteous win!