According to the Coinopsy research group dealing with the statistics of the "dead" cryptocurrencies, 264 altcoins and tokens, which were active in early 2018, could not stand the bear market and ceased to function. More than half of them launched as ICOs in 2017.
Coinopsy refers to "dead" coins projects that have been abandoned, used to implement fraudulent schemes, do not maintain a website, do not have active networks, updates on social networks that have problems with wallets and do not have any developments and adequate amounts bidding.