This Epistle the Apostle Peter wrote for an altogether different purpose to First Peter. The latter was intended for encouragement to Believers passing through severe trials and bitter persecutions. On the other hand,

Second Peter was written to warn the Lord’s people of the presence and propaganda of false teachers and of their corrupt and corrupting doctrines. 

As Christians grow in understanding, they will be safeguarded from false teachers, especially those who deny the return of Christ and the end of the world as it now exists.