The next two halvings probably won't cause any problems, but over the next 3 decades, the block subsidy will reduce by a factor of 256. Maintaining security aga

The next two halvings probably won't cause any problems, but over the next 3 decades, the block subsidy will reduce by a factor of 256. Maintaining security against 51% attacks will require a constant backlog of high fee paying transactions. Although we've seen that happen periodically in bull markets, I wonder if that's sustainable long term.