You already invested and now you are looking for answer why you did it? That is really bad attitude! Even in this case when it is not a small amount. So next time, before you emotionally decide for something, educate yourself about it at first! 
It's not something wrong to see that, he was only looking for the opinion from the others regarding the reliability of oikos project and we know that this is a good project that has already developed the product. Your opinion will make him sure if this project is the best choice to invest.