P2P is the best way to buy Bitcoin, but most physical p2p do resolve to scams and most people don’t usually use it to buy Bitcoin anymore.

Therefore, most people do use centralized exchanges to buy their Bitcoin because it is less riskier and most reliable way now to purchase Bitcoin. Although, the KYC involved is the main challenge here because privacy is very important and many people don’t like sharing their personal details; therefore, they will rather use decentralized exchanges with good rate to buy their Bitcoin and they do send the Bitcoin out to their personal wallets after buying the Bitcoin from the exchange because holding your Bitcoin in exchanges is very risky.