Bitcoin serves as a replacement for toilet paper money as well as a store of value similar to gold. A blockchain is a transparent and tamper-proof ledger, and blockchain technology is altering the world in the same way that bitcoin is revolutionizing money. Bitcoin is stored in wallets with public addresses, but bitcoin can only be transferred from that wallet using a private key known only to the wallet holder.

Thousands of personal computers monitor every bitcoin transaction in the blockchain to ensure that it is accurate and transparent.
So, my final thought is that the purpose of bitcoin is to give financial freedom to everyone and be followed by privacy.