The absolute minimum to buy Bitcoin is technically ( 0.000000010.00000001
Most major exchanges and apps set their own low entry bars to make the asset accessible: Buy with as little as $1 . Coinbase : Accepts deposits and orders as low as $1 . Binance : Generally requires a $5 minimum for trade orders.
Start with $1 using the "Buy Crypto" button or $10 on basic interfaces. Bitget : Supports purchases starting at $1 . The "Fee Trap" Warning