Godspeed vs. good luck

As a follower of The Way (Acts 9.2 cp. John 14.6) maybe we ought to wish people Godspeed and not good luck.

Godspeed: An expression of good will to express concern and prayer for someone on a journey or a daring endeavor as a reminder that nothing is random and out of the hands of God.

Good Luck: A sacrilegious comment which implies that anything can be random and out of the hands of God.