[Crypto-World #2] Why people invest in the EOS ICO the first day?

In my previous post~
Crypto-World #1 > Everything is going down?
~I was talking about the fact that the EOS ICO already reach, so far, $16 millions of investment.

I don't understand at all why~

Source: https://eos.io/

We have 5 days to invest in the current distribution. Why people do not wait the last day to decide if it worths it to invest or not according to what happened the 4 first days?