I have heard of ICO's where they only have a wordpress site and no code or backend at all (other than a bitcoin address). Which means that its impossible becaus

I have heard of ICO's where they only have a wordpress site and no code or backend at all (other than a bitcoin address). Which means that its impossible because they already turned your btc into fiat. But in general the answer is no because once they have your bitcoin and cash out to cash who are you going to ask the money from? The person that just disappeared?