All Traders has a big knowledge regards in trade they never expected to win in trade cause they know that in market the cryptocurrency in trade is Volatile and everybody know that in trading is unexpected wetheir we lose or win.
Some newbie in trade and they have not enough knowledge regards in trading after that they take a risk an they just lose, all they will say that trading is a scam ,fake, not reliable, and not Good to trade. That's why they lost their faith about trading . That's why some traders here give some advice on how to trade or before you trade we must learn how to enter in trading.
If there are somebody saying that trading is a scam, it was happened because of their greediness for thinking to earn quickly they thought
that it is their lucky day to earn here in a fastest way. So, in the end of course they would cry in the end. Where the main fault to be blame is themselves. That's is why before entering here in crypto trading this should be apply DYOR(Do your own research) but they always ignored this
advice.