With this Defi hype, yes, I believe ICO's comeback is possible. People started investing in projects once again, and almost every Defi project is raising money from the ICO sale, not IEO! Oikos Defi was sold more than 50% through ICO; even they raised 2 Million USD from the presale! Recent DIA Defi managed enough investors for their private sale and bonding sale! People left ICO because scammers ruined that, but when good startups are coming with unique technology, people do not fear to invest in those ICO sales!