First method:
Thieving. well known, but great fast cash. to start just do ::thief
Second method:
Runecrafting. Buy pure ess and withdraw 1 ess. craft it. for example: for EACH ess u get 44444 coins. if u have 2 ess on hand u still get 44444 coins. not double it.
IF YOU WANT ME TO ADD A VIDEO OR PICTURES FOR RUNECRAFTING I WILL ONCE MY COLLAR BONE HEALS