why does alex riley carry around a silver briefcase?

They were out of black ones

It commemorates The Miz having the Money in the Bank briefcase . The Miz carried it around for so long that it basically became a traditional foreign object for him . Kind of like Big Boss Man's Night Stick or ''Hacksaw'' Jim Duggan's 2 by 4 (2x4) .

When he had the MitB briefcase he would use it as weapon. This briefcase takes it place

i think of perhaps this is because of the fact for the reason that he carried one for see you later, and used it to as a foreign places merchandise in some fits, that it has grow to be his signature merchandise. kind of like HHH with the sledgehammerr, Sheamus together with his metallic pipe final twelve months.

It is part of Miz's i am better then u gimmick. Like I am not only WWE champ but remember i won MITB.

basically it symbolizes him winning MITB

I have a business man fetish and I think his briefcase is sexy

It's The Miz's lunchbox.

TO USE AS A WEAPON WHEN THE MIZ IS IN TROUBLE (AKA TO HELP MIZ CHEAT)

miz's tampons and hair gel

AS a weapon