The word predestination (proorizo) means to mark off beforehand. The death of Christ was predestined by God (Acts 4:28). Believers are predestined in Christ to adoption (Ephesians 1:5), to an inheritance (v. 11), and to be conformed to the likeness of Christ (Rom. 8:28-29).
The root word for predestination pictures the horizon of the sky and earth. At a distance, you may see where the landscape of the earth ends and the sky begins. That's a line drawn by God Himself. Your destiny in Christ draws the line between those who are saved and those who are not. God has "marked off beforehand" to save all who believe in Christ (Acts 16:31). Believers are predestined in Christ to an eternal inheritance, which is to be conformed to the likeness of Christ.
Predestination in Christ means all believers shall be glorified into His likeness (Romans 8:29-30). We shall be glorified in a body like unto that of our risen Lord. "We shall be like Him, for we shall see Him as He is" (1 John 3:2). That's your destiny foreordained, as a believer in Christ.
As believers in the Lord Jesus Christ, we have a destiny foreordained by God. That is our security as believers. Yes, we are predestined in Christ. God's plan for us is certain. We are predestined as God's adopted children, by faith in Christ, unto an eternal inheritance to be glorified in Christ. We are predestined in Christ to an inheritance.