Centra Tech, a widely advertised ICO had it's co-founder arrested after they were trying to escape the country with collected funds.
They were successful in raising 32 millions by claiming to offer a variety of financial products, including a debit card backed by Visa and MasterCard, with which users could instantly convert cryptocurrencies into US dollars and other legal tender.
Floyd Mayweather had previously endorsed the ICO, probably a paid job.
Well if these people did something wrong with the investors they are probably deserve what they have! floyd mayweather is just a dickhead who wants to earn more money from anything,this is all about the money that is why floyd have endorsed it to the public,floyd surely has a lot of centra investment that is why he didnt bother to promote a scam ICO.