Its called not wasting gold on dumb stuff.
My gold stocks have just slowly increased every phase from normal gameplay, because i dont waste it.
Your alts dont need a bunch of BoE epics, full consumes and an epic mount the day you hit 60.
You dont need to pay a bot for boosts and carries.
You dont need to power lvl a profession from 0 - 300 entirely with AH mats.
You dont need to pay bots for a summon any time you want to travel more then 1 zone from your current position.
You dont need to buy all the raid gear you loose the roll on.
ETC.
Stop wasting your gold on dumb things.
Stop paying bots to play the game for you.