every single day ICO projects always appear with their respective advantages. but in fact, many are experiencing failure in the end. they just waste time and spend money to advertise? how about you're opinion 
I agree that many ICO failed because of lack of marketing and lack of innovation on their projects. Some ICO are just after the money of investors and Scam the many and left the project behind. But there are some legit ICO that has a good innovation and will probably boom in the future, Just be keen enough to choose the ICO that you want to invest.Yes, in Croatia we for example have a problem with writing good crowdsourcing projects. Oh yes, there are many. However, they are mostly not of any substantial quality and rarely receive some funds. Maybe we could say that we still don't have to many new technology adoptive investors, or on the other hand that we are scam proof.
Same is with ICO, it is very indicative that there is almost none existing that originate from my country.
Writing a good project is not an easy task. Recognising one also. However, at least it can be a good litmus paper for filtering scams. At least a good written project shows that the developer, even if scammer, is not at least looking for easy money and has invested some effort.