Altcoin stands for «alternative coin» and is basically every other cryptocurrency alternative other than bitcoin. (wirexapp.com)
Ethereum has become a popular cryptocurrency alternative to Bitcoin over the last year. (thecollegeinvestor.com)
With the rise of security tokens, tZERO, a subsidiary of Overstock, has launched their own security token ICO, with the hopes of eventually creating the first SEC regulated cryptocurrency alternative trading system (ATS). (cryptotimes.news)