It's hot wallet for gambling/exchange/mixing service
Or this address just want to move bitcoin to some addresses
I can tell you with a good amount of certainty that it is not a mixing service. That is not how they work.
I wouldn't be surprised if it is some intermediary address/wallet of some kind of service that holds bitcoin on behalf of others. (potentially a "chilly" wallet). It is probably sending funds to the service's cold wallet once it's balance reaches a certain point (or could be doing the reverse and refilling the hot wallet once it reaches a certain low point).