Revelation Chapter 4, Verse 10 (NASB)

^4:10the twenty-four elders will fall down before Him who sits on the throne, and will worship Him who lives forever and ever, and will cast their crowns before the throne, saying,

the twenty-four elders

will fall down before Him who sits on the THRONE, and
will worship HIM who lives FOREVER AND EVER, and
will cast their CROWNS before the THRONE saying,

When the four living creatures give GLORY, HONOR, and THANKS in verse 9, the ripple effect upon the 24 elders is to cause them to the three actions above.

Let's look at what "will" means:

"Fall down" means total submission as a servant before the Master.
"Worship HIM" means to give all praise to the Forever God.
"Cast our (their) crowns" means we/they recognize that even what we/they have been rewarded rightly belongs back with the Lord because of his GREAT WORK!

This GREAT WORK is a recognition of Christ's work IN US of regeneration; 1 John 3:2 -- we shall be like Him, He is not like us (physically sinful) today.

This GREAT WORK is a recognition of Christ's work THROUGH US of service; Romans 1:18-19 -- God is made evident in us. "Let the beauty of Jesus be seen in me!"

This GREAT WORK is a recognition of Christ's work FOR US of keeping, cleansing, protecting, and perfecting; Philippians 3:20-21 -- transforming our body.

The CROWN I receive is because Jesus Christ bears much fruit through me. So I really didn't get and don't deserve my crown anyway (John 15:4-5-8).