This time of year, Bitcoin users are looking to spend some of their digital wealth on gifts and presents for themselves, as well as for friends and loved ones. Unfortunately, this also attracts a lot of different types of sites, making promises on how Bitcoin users can double their coins by investing in HYIP schemes. A few months ago, these schemes became a major plague, and it looks like they are making a return during the holiday season.
http://bitcoinist.net/doublecloud-pw-is-another-bitcoin-hyip-ponzi-scheme/