The most recent one (April 2018), and apparently the largest ICO scam so far, was conducted by the same company which launched two projects —
Ifan and Pincoin. This was a marketing scam — they convinced 32,000 people to invest. After that, the owners ran away with more than 660 million USD. Ironically, Pincoin’s slogan was “Sharing is Caring.”
Onecoin has been subject to an ongoing investigation for over 18 months. Five countries have published reports, warning investors about the Onecoin cryptocurrency. Chinese authorities have seized over 30 million USD from the company.
Then, you have heard about
Bitconnect, right? Bitconnect was a typical Ponzi scheme. They had a landing platform that promised investors huge amounts of interest. Authorities have estimated that 700,000 USD of investors’ own money was lost.
Plexcoin was even crazier — they were promising 1,300% monthly returns. This in itself should be a huge red flag for all investors, yet many were still convinced to invest in this ICO. Luckily, the SEC (the U.S. Securities and Exchange Commission) classified the Plexcoin cryptocurrency as a security token and was able to freeze their accounts and stop their operations completely.
CentraTech was endorsed by superstars such as Floyd Mayweather and DJ Khaled. However, they were also promoting to have partnerships with Visa and MasterCard which ended up not being true. CentraTech’s two founders were arrested on fraud charges, pressed by their own ICO[?] which had meanwhile raised more than 32 million USD.
Source: Timotej Bodlaj`s Blog