I trade FX with about...well, 1-2 lots max, so I trade with 150-250$ and last week exceeded my goals and made about $400.
Believe it or not, I am "making it." I pay my expenses with my profits. But I can't afford to hang onto losing trades for more than $50 and at max $100.
(this was all learned the hard way, through "tuition" payments

yes, painful, but rewarding in the end..)
It doesn't matter how much capitol you have, it's about your skills and draw downs...
I do not lose more than 50$/trade on a total 2k account..that percentage is 2.5%.
If you have 100k, you wouldn't want to lose more than 2.5k. One million? Do not lose more than 25k per trade.
my buddy, took 4.5k up to 39k...
he is still at 39k and had good luck as well as good mental slate, skills, and mentor.. I wish I could say I started that good in my first month of trading, but whatever you do...DONT GAMBLE!
Keep it real
