You are absolutely right, during this long bearish season many many good projects died forever and some leave during the initial coin offer. The crypto market is unpredictable so far.
They died because many traders exit when bearish came. A lot of investor and ICO supporters have been irritated because their investment turned to zero. The bearish remarked the lowest point of cryptocurrency also, many projects died because of the market condition. However, time will come the good news will arrive. And we will see, the development for cryptocurrency industry that may bring back the trust for investors.