why 90% people loose money in share market

It is absolutely true that most of the people suffer losses in the stock market, but it is equally true that money can also be earned from the stock market, which is about 10% of the people who are making good profits continuously.
A question definitely comes that what do these 10% people do, so that they earn good profits continuously and what do these 90% people do so that they only get lost in the stock market.