Currently the majority of ICOs in 2017-2018 have disappeared or existed like ghosts on coinmarketcap. Only a handful of them have been truly successful. The same goes for investors' investments, they are used to develop bad products, which are not really necessary for the community, many projects have used up their capital and cannot bring in no product at all. It can be said that investors in the 2017-2018 ICO period had a lot of sad memories.