What to Merchant/Invest in G.E. Non-Members

I really need help on this and I figured Sythe would be the best place to come and ask as the runescape forums are no good and you guys are like T3h 1337 h4x . Anyways I can make money pretty good for a non-member and I want to invest with something but idk what or merchant something but dont know what to do so with .

If you guys could help out I would freaking vouch or w/e i can do to show respect like idk guys but help out if at all possible .

heres my skills if anyone needs to know

80 wcing , 49 rc , 58 crafting , 67 atk , 68 str , 56 fishing ,

I prefer using wcing as its my highest and Im already cutting 2.5k yews for 1mil to merch/invest with , thank you