slick presentation, slick website, and slick creator
But it had none of these, lol.
It's just the will of a large group to believe in magic, see for example religion. The pure beliefs of the bagholders will actually keep ethereum from crashing to zero for quite a long time, bar a second big disaster like DAO happening. Making it actually entirely possible it will pump many more times, much to the chagrin of bitcoin holders (ironically suffering from the same kind of blind beliefs).