There has been a lack of successful ICO projects mainly because the market has been on the decline now for over a year and also people have been shying away from ICOs in general. Many ICOs projects simply didnt have the experience or the funding to move forward with the project and had to call it quits. Some ICOs were just scams and people started to become reluctant to invest money into a token/coin prior to it reaching an exchange. Many ICO projects that did reach an exchange seemed to decline in price so you could usually get the token/coin cheaper after the ico ended. I think there will be some ICOs in the future, but not as many as there were in 2018.