That is true , not all ICOs is scam. Sometimes it will rising after one year .
But, stay carefull with the scam some ICOs project .
These are obvious things. Since 2016, nothing has changed. You do not invest in all projects in a row, no. Because not every project will make a profit, the same is true for the ICO and for the IEO. People finally understood that only the most worthy projects bring profit.