Your not paying for actual value at ICO, you are paying for potential. Again, taking Ripple XRP as an example, 1 year ago it was trading at $0.006 and this is a coin that has been in development for years compared to months for Oxy.
Yes, some investors will sell and others will buy what they are selling, but those same investors will come back in as Oxy grows and the trade volume goes up.
So the question is, do you still believe in the potential and can you afford short to medium term to have your $/BTC tied up as the project matures?
Personally, I intend to increase my holding whilst doing the same with other coins which allow me to day trade.