As time passes capital is growing and after certain limit of big capital it is very difficult to achieve same ROI because of low liquidity in trading.
Due to low ROI trader can feel that his performance is not up to the mark as it was earlier.
So, a trader can do more blunder to achieve same ROI with big capital.
With big capital handling of big qty is very difficult due to low liquidity and hence slippages will lead to losses also.
After having small losses trader will try to recover that in same speed with big qty and that may further lead to more losses.
After losses trader will feel very bad due to his/her past performance and that can lead to more blunder
So in my opinion don’t expect same performance in your trading career with big capital.
Divert your fund to some other assets and go ahead with your success.