The first altcoin is NMC (Namecoin). It was introduced to the market in 2011 as a digital currency, but the original idea of the developer was to create decentralized domain names.
Such a structure can be used not only in the field of cryptocurrency mining, but also to create various online resources that are completely independent of the policies of any countries or individual regions.
Unlike bitcoin, from which Namecoin was copied, there are some very significant differences. The first is the need to register your own domain name in the .bit zone. Despite the low price (about 1 US cent), you will have to spend time to understand the system and choose a unique name.