They have many scammer out there waiting the right time to scam other people accounts. They many ICO now are scam they rides the time that they have many ICO that have a promising project and can get a bigger profit. In entering in a bounty in a bounty campaign they have many scammer waiting and doing many technique on how to get rid other people. But for me I don't  scammed yet and I research and ask other people on how to prevent from scammer.