Of course # 1, the value is so great has made many people in the world hypnotized and race to get as much as possible. With such great value has raised popularity of bitcoin wilder and shot up to reach 500% in December 2017 (best record) . For 2018 I predict the bitcoin price will repeat its second best achievement even its value will probably exceed $ 20,000 but will not be up to $ 30,000 as bitcoin growth is slightly hampered by the emergence of new coins that will enliven the crypto world in 2018.