Bitcoin is the advanced technology useful for doing big transactions in a simple way. Some of the people said that Bitcoin is not useful, waste of investing money, etc... Don't think in negative way and research about bitcoin, then you will get an overall idea. Be positive....
Yes, bitcoin has got lots of good than bad. As everything has got good and bad, bitcoin too has got bad in it. People who prioritize the negative part can never be good with bitcoin, because always they have a fear in mind. When it comes to bitcoin one need to believe in it to use it to the fullest and profit.