A recent CoinKickoff report demonstrates the failures of various altcoin projects over the years and how Bitcoin is the most prominent survivor.
according to their data, 91% of the coins that were around in the 2014 cryptocurrency market crash are now completely abandoned. A large portion of the now dead coins were created in 2017, with 704 now dead coins being created that year. The crown of the deadliest year in cryptocurrency history is 2018, during which 751 coins ceased to exist.
A visualization created by CoinKickoff illustrates how many of these projects have come and gone, along with their respective reasons for failure. Reasons include being a scam or other related issues, being a joke or serving no purpose, being an ICO or short-lived scheme, or simply running out of volume.