How do you make gp in RuneScape

there are lots of different ways the best ways are only for members but for members there are green dragons fishing shark/monkish and god wars dungeon for high levels there are more for members. for non members you could cut down yew trees needing level 60 woodcutting, mining rune need 85 mining for rune ore. but the best money making gp on = runescape is to merch (invest) this scheme is a scheme which more money = more profit you go to the grande exchange and buy in an item wait till i goes up in price then sell. do this scheme if you have 500k or more or its nothing much at all