The value is mainly dependent on the law of supply and demand. When there is high demand the value rises, whike on the contrary when the demand decrease the value dump. Bitcoin will continue to rise simply because the supply is becoming limited. There are people who attempt to decrease the value of bitcoin by making people panic through making fake news. There were also rich people who tried to manipulate it but they cant have the full control. Bitcoin is gaining popularity that is why more and more people come to know it.