Ninety percent is way too high. There may be a lot of low value projects, but it is unlikely that 90 percent are just outright scamming you.
Where are you coming up with such high numbers?
maybe it means better safe than sorry. ofc it's hardly that full 90 % are scams but this number imo includes weak and uncompetitive projects that die fast.
we have to be carefull of the shit ICO. this is 2018 not 2017 it means many shit ICO nowadays
do our own research and do it carefully, only that thing we can do to avoid shit ICO imo