why and why a lot of trust for bitcoin ...!

Most trust in Bitcoin comes from the fact that Bitcoin does not require any trust at all Bitcoin is entirely open source and decentralized, This means everyone has access to the entire source code at all times. All the developers in the world can verify exactly how Bitcoin works. All published transactions and bitcoins can be viewed in a transparent and real-time manner by anyone. All payments can be made without being dependent on third parties and the entire system is protected by a peer-reviewed cryptography algorithm as used in online banking. No organization or individual can control Bitcoin, and the network remains secure even though not all users can be trusted.