Well, you need at least one or two that aren't invisible, because otherwise you won't be able to sell stuff anymore, as things in invisible bags don't appear for vendors or the trading post.It would also mean equipping a lot of characters with them, as so far I have used the normal 20-slot bags e.g. from Halloween, as they're easier to obtain.The options would therefore be (at least in my case)a) spent a few hundred gold to retroactively get invisible bags for all my charactersb) ask for an option to toggle the button