If They give you Their permission to it, then yes, it can be useful and a kind gesture as well. But decide with caution. It makes a permanent link to you for Them in this physycal incarnation.
I’ve got Abaddon’s Sigil on my wrist, and I’m ready to get Lucifer’s, Belial’s, Chernobog’s slowly.
So yes, ask Them first, and if They let you, go for it.