I know guys who have made $2000/week trading bonds with sub $100k accounts for the last 20 years. They just can't make the leap to the next level.
Similar to me, I can make 5-10k a month off a sub 50k account. But never really got any bigger apart from a few glory days about 10 years ago. The books say "oh just up your size, everything is exactly the same". Its not the case. It isn't just exponential growth. But hats off to the guys that make it to the next level. It sounds impressive but after software fees, data fees, lack of job security, no holiday pay/sick pay, stress its not all its cracked up to be. Its just about worthwhile at that level.
There are clearly members here doing so, but it's still a self-defeating question, for two main reasons: first, they have no incentive or reason to say so; secondly, many/most of them will be doing so largely while trading OPM in exchange for salaries/bonuses, rather than their own PAs.