I follow John Carter for about 6 years, sorry for my English i'm french from Canada.
John Carter is consider an agressive trader and you must be sure to not follow all of his trades specially when he buy 100 contracts os tsla or he sells 30 vertical naked puts for example. But John became more moderate over the year's and he emphasis on money managment and to cut your losses when a trade go againts you.. I think every trader as something to teach you and with all the experience of his group i'm satisfied, one will say I'm bullish and another i'm bearish.
I think he start with 100k beginning of 2017 and he is around 700k actually. I see is portfolio every week growing, I think this bull market help a lot but we are cautious now and we sit on cash mostly, just day trades here and there.. He did most of his money on TSLA and PCLN this year.. I saw he's 1.5 millions trade on tsla live some years ago, was a bit scarry but real, was a very risky one and he agreed on that.. But you're trading belongs to you or your style don't get focus on one big trade, it is a process and can take a lot of time(15-20 years to be good ..)