Bitcoin Network Hashrate Exceeds 5 Exahash per Second
Bitcoin's total network hashrate surpasses 5 exahash per second, demonstrating continued mining investment and network security growth.
On June 11, 2017, Bitcoin's total network hashrate exceeded 5 exahashes per second (5,000,000 terahashes per second) for the first time, marking another milestone in the cryptocurrency's security and scale. This represented approximately a 250% increase in hashrate over the previous year and reflected massive ongoing investment in Bitcoin mining hardware and operations despite uncertainty about the network's technical direction.
The hashrate growth demonstrated miners' confidence in Bitcoin's long-term value proposition and their willingness to invest in expensive ASIC hardware with multi-year payback periods.
The achievement of 5 exahashes per second made Bitcoin by far the most computationally secure blockchain network in existence. The massive hashrate meant that attacking Bitcoin's network through a 51% attack would require astronomical capital investment and ongoing electricity costs, making such an attack economically irrational for any rational actor.
The hashrate growth also reflected improvements in mining hardware efficiency, with newer generation ASICs providing better performance per watt and per dollar invested. However, the hashrate concentration in large mining pools and geographic concentration in regions with cheap electricity (particularly China and some North American locations) raised ongoing concerns about centralization risks.The continued hashrate growth during a period of intense controversy over scaling and governance demonstrated that miners remained bullish on Bitcoin's future despite the uncertainty, viewing the current conflicts as temporary challenges that would be resolved without fundamentally damaging Bitcoin's value proposition.