Bitcoin simply means nothing, its virtual and only exist in the web. Bitcoin have its value from the people who used it and creating a network of users of bitcoin. People use bitcoin because of the technology behind it and that is blockchain technology wherein anyone can transfer money through peer-to-peer transaction without any middle entity like banks and government. No one is in control with your coin except you and no central control of the network - it is decentralized and have an anonymity characteristics.
In conclusion, bitcoin only exist in the web and the one who gives value in it are the network of people who used it and they use bitcoin because of the blockchain technology behind it and is decentralized!