invest small, but participate.
like any ICO there are many risks involved.
I do not think they are scammers, but you should not put too much of your money in ICOs, let alone 1 ICO.
Personally, I have put 5% of my total portfolio in ICOs, DCORP has 20% of that (=1%).

time will show if this is a good investment.
Again, it is not about how big your portfolio is, it is about spreading the risk.
I am by no means rich. I am just careful spreading my portfolio, as I work hard to earn it.