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, we may see where the landscape of the earth ends and the sky begins. That's a line drawn by God Himself. Our 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 in Christ are predestined to an eternal inheritance, which is to be conformed to the likeness of Christ.
Predestination means all believers shall be glorified in Christ (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 our destiny foreordained, as believers 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 have an eternal destiny as God's adopted children, through faith in Christ, unto an inheritance to be glorified in Christ. Believers in Christ are predestined unto an eternal inheritance.