One of my friend told me that he has heard about bitcoin as it is being advertised in that tournament and he asked me if he should buy Bitcoin as it was advertised in PSL ?
Was this the first time your friend hears about Bitcoin or you have discussed it before? I am curious because if he is hearing about it for the first time then why is he coming to you to discuss what he has never known before instead of asking for clarification of what it is 
Definitely, newbies to the crypto space could make these mistakes especially when they don't take the time to first know even though they are quite DIFFERENT.