If they're claiming about the owning of bitcoins, then ask them to control the price and the value. I've firmly believed only the owner of bitcoin can stop its value. We all know about Satoshi Nakamoto. First, he belongs to Japan while Craig is from the United States. In the world of bitcoin, everything is a fraud, and you can not trust anyone easily.
What we should be talking about is that if some one is claiming to be Satoshi the person is suppose to come front and say Bitcoin is created by him and looking at the surface of it Bitcoin is not for fraud is created to support fiat currency and for easy service and save of currency, because is decentralized currency that you will handle with you own security properties