Fidelity Investments has pushed back against claims that the Bitcoin network becomes less secure after each halving. In a recent report, the asset manager argues that Bitcoin's predetermined, fixed supply schedule does not undermine the security of the network, even as miners see their block rewards cut in half every four years.
The report directly addresses concerns that declining block rewards might reduce miner participation, leading to a drop in hashrate and potential centralization — both of which could weaken the network's resistance to attacks. Fidelity contends that the security model relies on the Proof-of-Work consensus mechanism, the distribution of hashrate across a global pool of miners, and the long-term incentive alignment among participants.
“A fixed supply schedule is not a vulnerability — it's a feature that anchors the credibility of the system,” the report notes. While acknowledging that the transition to lower block rewards can be disruptive in the short term, Fidelity highlights that market pricing already incorporates anticipated halving schedules and that long-term holders' behavior helps stabilize miner revenue through transaction fees and price appreciation.
The report adds that the overall security of the Bitcoin network has remained robust through multiple halving cycles, and there is no evidence to suggest the trend will reverse. Fidelity's stance aligns with a growing number of institutional voices that view Bitcoin's monetary policy as a strength rather than a weakness.