I know a really big amount of people that are using more than wallet, in fact, most of them are using up to 4 wallets, for different purposes, which is a very good idea.
You shouldn't use only one wallet for every transaction, you may want to spread your funds in the different places, to remain more safe and to prevent your money getting stolen.
That is why I use cold and hot wallet, because I always try to stay as safe as possible, unless I have to take a risk because of some reason.