Confidence do helps because it can help you to decide more easily and being confident or positive in life do also attracts good karma or luck however in crypto trading we dont totally hold the price or the market because they are being controlled by large group of companies/people commonly known as whales . no matter how confident we are with our moves or strategy but if the whales decides to dump and manipulate the market to go down , you cant still expect to win or earn within your trades .
it would stress you out once you failed up your certain trading strategy.You are expecting for it to be profitable but with cryptos unpredictable market and its movement
we cant really assure that our trading orders will hit up on our likes or on what we have planned and in result due to excess confidence where you do expect too much
will surely got frustrated.