Quote from Don Bright:
Sometimes a definition of "successful" is required. IMO, it takes at minimum a $million to engage in good, solid strategies (opening only, MOC imbalances, pairs, mergers, etc.), and since most retail traders don't have access to that much $$ (bp), they are not able to participate.
If said this quite often, my brother and I enjoyed the "floor trader" business model, keeping 100% of trading profits, putting up a token amount of capital ($20K or so), and then using (not abusing) what is now Goldman Sachs money to trade with. This allowed us to engage in these working strategies "back in the day" and we duplicated that business model back 1992, and we have been working with traders ever since.
If you can enter a business with what is basically an "unlimited" upside for $20K or so, and borrow a $million every day for little or no money, not a bad way to run your trading business. Over half our traders have been with us for 5 or more years, so yes, it can be a good long term relationship.
Of course, after making a few $million, then you have other options available (B/D for example).
Some people think about "Return on Investment" (not how I look at trading, but...) and if you're "good" then you can get 10 times (or more) return on that same investment, not bad either.
I prefer to think the $capital is just another tool to be used by hard working, well trained traders.
FWIW,
Don
edit: Now if you're talking about the firms that keep a percentage of your capital forever, then I agree with trading on your own in some capacity (after your free learning curve, if it worked out that way).