Nowdays most of indivudual investors prefer hold btc and eth instead of investing in icos, even in such promising like this one ...
There are 2 group, namely investor tokens and ICO investors.
Someone who chooses to hold btc & eth is called a treder, another thing with an ICO investor. So you can't say that most investors prefer to hold BTC & Eth instead of investing in ICO, in fact they all have own field.
An ICO investor, will continue to invest in various ICO whatever the reason, because ICO investment has become the habit of the person.
An trader, will continue to trading tokens for any reason, because trading has become a person's habit.
...and yet there are such! and there are many of them. so do not take it easy. this is a very big money, so you need to take into account the most everything!