If you are a full trader for real, I doubt that you never earn. Because, in my case I'm just a part time trader and even is like that for being a part timer I got earned anyhow here. How much more the full time traders. Because if you monitor the graph, and the candlestick for sure you'll going to have an idea of when to sell or buy.
He earned of course (I also doubt that he didn't) but the problem I see in his case is that he didn't managed well the situation when btc drop hard that result to all of his earnings gone. So unfortunate 
. Check one of his post, I emphasized the important details.
Means i trade at the screen 3-4 hours per day. In 1 hour sessions. Then learn and prepare offline 3-4 hours per day. No other job. Meticulous number keeping records.
I should count how many trades Im in executing daily. Maybe 50- 100 per day. I make money from every day except 3 days that BTC dropped hard and it gouged my account profits. My management of these risks needing improving.