this point is good and understandable because if a person regularly wins then it is possible to achieved the desired goals so confidence in that person increases therefore he will talk about his trading system with confident attitude to the others.

But I think making a profitable trading system will requires time it cannot happen quickly and during this duration you will face losses as well as gaining so I think that confidence will create only when you see different situations. A profitable trading system can only originates when you have complete knowledge about the crypto market and have spend lots of years for getting the basic point to be a successful trader.