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Frauds and scams are very popular already with crypto. From Bitconnect scam to Centra scam to different exchanges being hacked or scammed. I saw so many hacks and scams happened in crypto world already in the past 3 years and I already have a basis whether a coin is a scam or not. New projects right now are the highest chances of it being a scam because scammers want to scam newbie investors and they can do it thru launching a scam project. Either way, just be knowledgeable and do some research before investing on different coins or projects.
That is why we really need experience in this cryptocurrency ecosystem. Ecosystems that are still "young" and have the potential to expand more broadly, making it easier for fraudsters to trap new investors. Especially newbies who are interested in crypto just because they want to get instant profits, so they take all the means to join without considering the risks and without analyzing. It was a fatal mistake. When they are trapped and lost, they say that crypto or bitcoin is a scam. Even though it was their own fault because they were too greedy.