I personally flip, make about 800k a day atm without having to be on for more than 5 minutes, and thats with only 13mil to my name. I also pk, so the two together i should be rich soon
Frost dragons, Botting Rc and sorceress garden, picking up blue dragon scales in the resource dungeon, there's a variety of things you can do to make money.
If you have about 10m starter cash flipping is excellent.