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Miners also receive transaction fees.

• abstractbarista 7y ago
  This is a crucial point. The idea with BTC is that as the block reward decreases over time, transaction volume (and therefore fee collection) would increase. This requires the network to be used more over time, which does appear to be happening.
  • wmf 7y ago
    Given that transaction volume is capped, fees may be very very high in the future.
    • xur17 7y ago
      There are several systems that would allow users to essentially batch settle (ex: lightning network), at which point fees could presumably rise significantly.