The only thing I know about Bitcoin is that it is a virtual 'money' but what are the other use of it? What are your advantages for having a bitcoin? 
i am still a new beginner and there are a lot of advantages of having a bitcoin,one thing i know is you can earn a money here from bitcoin and you can know more about bitcoin,if they will ask you about bitcoin you know what is the answer so that is the good thing for joining bitcoin.