Originally Posted by
Acquiesce of Telara
Good question.
If you're new to the game, at 50 you'll likely scrounge around to find the cash for your 110% mount, which is...125 plat, I think? If you use your professions and the AH, you can be making 50-500 plat a week, easily. If you spend time hunting and selling artifacts, you could make anywhere from 50-1000 plat a week.
If you've been playing for a long while and do dailies, play the AH, run dungeons, farm, and everything else possible, you could be sitting on 20k-100k plat right now.
There's crazy folk who have multiple characters on multiple servers running a business. They've got who knows how much plat between chars, and with free transfers, they could consolidate their holdings on a whim.