Question about putting coffee cans in the freezer?

Okay so you know how some coffee (I’m referring specifically to Cafe Bustelo) come in tin cans?
I always put those cans in the freezer to make the coffee last and stay fresh
But is that a bad thing to do? Is it safe?

someone explain :/

It’s perfectly safe.

As for freezer burn, I doubt a can will be in the freezer long enough to get this.