Bitcoin isn't quite anonymous. It's pseudonymous. The exchanges have KYC (Know Your Customer) and AML (Anti Money Laundering). From there they can use the blockchain and do chain analysis and make inferences about who is who from the starting point in the chain.
It's possible to use bitcoin anonymously if you're an IT expert, but difficult.
thank for ur suggest....i will try my best....bitcoin now is my passion.....follow and upvote me https://steemit.com/@zarrah