in this time is ico is the secure way to invest or all the icos are scam ?
It is not necessarily all ICO are scam, there are still ICO who can produce profit and pays. It is about playing smart in where ICO to invest. You need to be wise in choosing because there are lots of ICO who only wish for their pwn benifit and it is not good. Threfore you need to be smart and wise in choosing where ICO to onvest.