Was rvn mining always this profitable ?

So i want to put some moneh in gpus and j currently have 1× rx580 8gb + 1× rx 570 4gb I'm planning to get ×4 more rx 570 but in order for it to be profitable for me is so that each card make at least a dollar a day Did rvn make that much last year and what do you think it will do in the future ? Is it a good idea to invest and begin mining now ?