45 On the verb λάβῃ (labē) here 583 λαμβάνω 2 states, “to take away, remove … with or without the use of force τὰ ἀργύρια take away the silver coins (fr. the temple) Mt 27:6. τὰς ἀσθενείας diseases 8:17. τὸν στέφανον Rv 3:11.”
46 Your crown refers to a wreath consisting either of foliage or of precious metals formed to resemble foliage and worn as a symbol of honor, victory, or as a badge of high office—‘wreath, crown’ (L&N 6.192).

In other versions

I am coming soon. Hold fast what you have, so that no one may seize your crown.

I am coming soon. Hold on to what you have, so that no one will take your crown.

I am coming soon. Hold on to what you have, so that no one takes your crown.

I am coming soon. Hold on to what you have, so that no one will take away your crown.

I am coming quickly! Hold fast to what you have, so that no one may take away your crown.

Behold, I come quickly: hold that fast which thou hast, that no man take thy crown.

Public Domain