can we invest on it .
Such a strange question. Of course you can. If you are not a resident of United States of America
Maybe you would like to discuss on some of them specifically?
Residents of USA can't because this is against the law? I bet they still doing that but unofficially and with a use of anonymizers.
And I disagree that it's lot of ICO coming. The era of thosands of ICO has passed and now there would be much less ICOs but they will be much more professional.