Just because they can fake it doesn't mean they can make it with the methods they have that doesn't make it. You can be over confident or maybe just enough confident to look like you are a good trader, however that doesn't change the fact that if you are not making any profits, you are not a good trader. So, you can't fake trading, you can't fake profits in trading that is not possible, mathematics are mathematics and profits are profits. Either you are a good trader and have some profits or you are a bad one and have losses.

However, if you are trying to get other people to invest into your trading like some sort of ponzi scheme and eventually hope to make money with all those investments, I could understand why fake it until you make it could actually work.