Bitcoin value is now fairly high because it has an officials status recognized by international.so the bitcoin depends a lot on the trust of the people.
So many judgement about bitcoin price but even it has many issues claims future still varies from the users. Yes it is high because of bitcoin popularity. Bitcoin value I think of surges high this year so I really beliene in bitcoin future.
The bitcoin value depend on the number of people who are holding it I guess, some of them are long time holders and kept their coins for a long time, waiting for it to grow in the future.