Most of them were just not worthy to invest but we can't say all the initial coin offerings are trash.
Some of the projects really worth to invest you need to find that by your own then you won't say they are trash when you can able to make something from it.
Right, a large percentage of them are really not worthy in terms of real a solution too, they just tend to fabricate a Whitepaper with no reasonable real use.
You need to analyze the solution the project proposes. If it is a real way to resolve a real problem the project can be a good one.