Not only high leverage but any leverage is dangerous. They can win for 99 days but that one fine morning when bank nifty skyrockets or crashes these leverage traders will lose big. Sometimes the mtm loss may exceed even the initial margin they had put.
Hence please stay away from leverage
When u have full amount buy the stock in cash and sleep peacefully. If still cannot come over trading addiction join a good brokerage firm or prop desk who have profit sharing model.
Remember trading is injurious to financial health
Recently a trader in Erode took his life due to loss in options trading. His name narasimhan.