When the 21 M cap hits, block rewards vanish. • 1 block ≈ 1.8 M kWh → $92k power • Reward now: 3.125 BTC ≈ $338k • Fees only $23k (≈7 %) Fees must 4× just to pay the electricity - more for hardware & profit. If BTC remains mere “digital gold,” who funds security? 🤔