Virtual currencies are often associated with all kinds of negative terms, including scams, hacks and pump-and-dump schemes. Especially the latter category is far more common in the world of virtual currencies than one might assume, as most of the “altcoins” are created by a group of developers looking to make a quick buck. In all fairness, with over 4,000 virtual currencies in existence already, there is no need to create more.
http://digitalmoneytimes.com/crypto-news/altcoin-pump-dump-punishable-law-south-korea/
