Psalms 52:6-7

⁶ The righteous also shall see and fear,

And shall laugh at him, saying,
⁷ “Here is the man who did not make God his strength,
But trusted in the abundance of his riches,
And strengthened himself in his wickedness.”

As a reminder that we as righteous are not immune to falling into the ways of evil, we "also shall see" God destroy those who love evil and shall "fear" God who destroys those who love evil.  As in Psalm 59:13, David wants the righteous to know there is a God through the witness of evil being destroyed.

I can feel the Spirit inside of me and it doesn't want to see people fail.  But, sometimes it is necessary so we can rest assured that God's way is the right way if we have any doubts.  When those who love evil fail and fall, we can praise God.  We praise Him not for their fall, since those who love Him do not want any to fall as He does not.  2 Peter 3:9 says "The Lord is ... not willing that any should perish but that all should come to repentance".  But we praise Him for His righteousness.  We praise Him that His way is the only way; that truth and life only come from Him; that those who love Him are never forgotten.  When those who trust in the pleasures of this world are consumed by it, we are reminded that there is only One that endures forever and that can be trusted, and that One is the Lord our God.  He is the only strength, the only power, the only protector, and our only Savior.

Why did these evil fall, because they trusted in their own fortunes, they trusted in themselves.  "For the love of money is the root of all kinds of evil, for which some have strayed from their faith in their greediness, and pierced themselves through with many sorrows" (1 Timothy 6:10).  Only God can be trusted and only His Word endures forever.  "All flesh is as grass, and all the glory of man as the flower of the grass.  The grass withers, and its flower falls away, but the word of the Lord endures forever" (Isaiah 40:8, 1 Peter 1:25).  

We should be diligent to seek out our Lord.  2 Peter 3:17-18 says, "beware lest you also fall from your own steadfastness, being led away with the error of the wicked; but grow in the grace and knowledge of the Lord and Savior Jesus Christ."  It is perhaps the most critical part of our daily life.  The purposeful and intentional aim of praying, reading, and praising our God.  I do not know anyone who would not rather grow their faith in God in this daily way than to have to see evil people consumed by their own evil.