Bitcoin's Energy Consumption Not the Real Problem

The debate over Bitcoin's energy consumption has been ongoing for years, but a new perspective has emerged that challenges the conventional wisdom. According to recent data, the world's data centers, driven by artificial intelligence (AI), now consume more electricity than the Bitcoin network.

In 2021, the Galaxy Digital study estimated the Bitcoin network's annual energy consumption at around 113TWh/year, which was comparable to the banking sector and gold mining. However, this comparison was misleading, as it did not account for the fact that legacy finance systems do not have a direct energy consumption meter attached.

Fast-forward to 2025, the Cambridge Centre for Alternative Finance estimated the Bitcoin network's annual energy consumption at around 138TWh/year, or roughly 0.5% of global electricity. In contrast, data centers used about 415TWh in 2024, accounting for approximately 1.5% of global electricity.

AI is a significant contributor to this trend, with the International Energy Agency (IEA) estimating that it accounts for around 5-15% of data center power in recent years. By 2030, AI is expected to take up 35-50% of data center electricity, surpassing Bitcoin's consumption.

But there's a twist: Bitcoin's energy consumption has remained relatively stable, while AI's appetite for electricity continues to grow. Moreover, Bitcoin mining has become increasingly cleaner, with an estimated 43% of its power coming from renewable sources and 52% including nuclear power.

Steven Boykey Sidley, a South African bitcoin author and partner at Bridge Capital, notes that 'no one talks about bitcoin mining and energy anymore because it became extremely clean, moving to renewables in search of lower costs.' The network's emissions are equivalent to those of a mid-sized industrial estate, rather than a civilizational threat.

The shift towards AI has also led to a change in the way miners operate. With AI demand driving up memory prices and reducing the profitability of mining, many miners have switched to renting out their power to AI companies. This 'great defection' has re-priced the industry and moved it away from Bitcoin mining.

As Sidley warns, the genuine worry is not coin supply but network security, as a smaller hashrate can be cheaper to attack. However, at 900 exahashes, the network still dwarfs any potential attacker.