Currently, in my campaign the players have amassed about 210 karma each and around $2.2 mil.
However, they have also had alot of out of pocket expenses that have eaten alot of the cash (like home getting destroyed, paying to smuggle themselves and gear around the world, bribes and pay-offs.
I think the richest player has a liquid worth of around $375,000 in toys and lifestyle and an other $250,000 in cyber.
I track how much they have earned VS how much I "take away". I shoot for an average earnings of around 3500 per Karma, but playing stupid is a costly mistake!