According to Samson Mow (@Excellion), 'buying Bitcoin' is the act of exchanging fiat currency or other digital assets for Bitcoin (BTC), resulting in direct ownership of BTC on a blockchain address controlled by the buyer, as stated on May 27, 2025 (source: Twitter). For traders, this definition emphasizes the importance of self-custody and on-chain verification, which impacts security, liquidity, and real-time trading strategies in the cryptocurrency market.