I don't know who the 1% successful traders mean...
everyone ever profits and losses in trading but there is a hidden group *maybe whales which are compact selling when it must to selling and buying when it must to buying. *maybe the whale's group which is 1% successful in the trade
Maybe. However, there are many traders who are experienced enough to get an idea of the next movement in the market. And I think they are also the 1% traders who can earn by trading. Whale traders dominate the market and make a profit through their huge funds. And the retailer who makes a profit from the market earns by trading using his knowledge.
So according to those small experienced traders are also among these 1% successful traders.
Also possible, but if that is the case - knowledge can be learned. So the retail trader would accumulate enough knowledge and become a whale him/her/self. Thus others seeing that would repeat that many times and in large enough sample data, there will be too many whales who are continually earning good profits systematically (!) and persistently (!). But that's not the case at all... One among many other examples is LTCM (
https://en.wikipedia.org/wiki/Long-Term_Capital_Management) - they got most money at a time, most talented people, they were definitely the whales but...

Yeah this is what I know. Retail traders gradually became whale traders at one time. Because the retail traders who can make a profit from market, they make a profit by using their knowledge in the right way. So it is conceivable that these traders can guess at a much deeper market move, so they can take advantage and they express themselves as successful traders.