in another way of trading like a spot or something those persons who have no idea of reading the chart can still win and that is through following the current trend. That strategy is the most commonly used by newcomers in the crypto market. This could also somehow work on future trades but not all time of course.
Yeah both spot and margin trading might get us profits for same level of knowledge and technical analysis but when people go for higher leverage then the chances for withstanding against high volatility becomes lesser as they may get liquidated. This is the simple reason why people are successful with spot trading but facing losses in margin trading.