About Bernankoin (BEK), I think this should be put under "high risk".

Background: as far as I understand the coin is meant to be a political joke. The idea was to demonstrate practically a system based on the principle: "a more money already issued, a more money will be issued". This means, a more miners will partake, a higher the block reward will be. As of a statement of the author I think to recall, that the coin cannot have long term value, and is not meant to.