Who are in your opinion these ∼1% of traders? Why they are able to remain profitable? Are you sure you are one of them, if you include taxes, fees, etc.? 
These are the most experienced traders. They have a different source of income that helps them to sustain their trades. I'm not one of them but how I wish that I can be part of that very small percentage that managed to continue trading all of their lives. As a holder, I only trade when it's the right time, and probably this 1% have done day trading before to master the market for a long time. And after that, they've chosen to manage and become stable through holding certain stocks and cryptos that they rely on someday.