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Anyone team still willing to conduct ICO should come up with a mechanism to defend their projects from gravitation free falls, so as investors don't loss hope in their project and later blame the hailing market. Hard times call for a new set of thinking for a change.
I disagree, what you are proposing is that the developers should somehow control the price of their coin and we know that price controls have never worked and there are countless instances of this happening through history and turning out badly, the market should decide what it is the price of something and if at some point the market decides that the value of the coin in which you invested should be very low but you are sure that it is a good project then you should take advantage of it and get more of that coin while it is undervalued.