P2P Platforms: Platforms like LocalBitcoins, Paxful, and Bisq allow you to buy BTC directly from other individuals. They often provide a variety of payment methods, including bank transfers, PayPal, and even cash. These platforms typically have escrow services and a reputation system to reduce the risk of fraud.
Its better to use bisq or hodl hodl in buying, i don't know why the use of centralized exchange has been so common with the people in buying or investing in bitcoin, i think its may be due to the fact that they often use some of these exchanges in making trades and they will see it more easy and convenient for them to use the same exchange in buying bitcoin, but they are not the only means neither are the exchange the best way of storing our digital asserts.