Security is the non-negotiable foundation of Bitcoin.
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In public debate, security is often treated as a technical variable, a parameter that can be adjusted according to the desired level of performance.
It is treated as if it could be increased or reduced without systemic consequences.
As if it were a feature rather than an inherent part of existence.
In the case of Bitcoin, however, this interpretation is deeply misleading.
Security does not coincide with the absence of bugs or the mere robustness of the software. In Bitcoin,
Security = resistance
to three fundamental events:
1. rewriting transaction history;
2. a coordinated economic attack on consensus;
3. the possibility of persistent censorship.
Security is the system's ability to render these events uneconomical, unstable or temporary.
This security is not abstract. It is based on real economic costs sustained over time, institutional barriers that make attacks equivalent to the destruction of value, and intertemporal credibility, without which no promise of neutrality can be upheld.
It is not protection 'for the user', but rather protection of the system against the user should they act opportunistically.
The purpose of Bitcoin transactions is probabilistic rather than instantaneous. Irreversibility is not decreed, but emerges from the progressive accumulation of costs required to rewrite the past. It is precisely this asymmetry between the ease of daily use and the difficulty of a systemic attack that makes the ledger reliable over time.
Reducing security to increase throughput is not a neutral choice. It means:
- compressing the cost of attack;
- lowering the threshold of rewritability;
- transforming trust from an emergent property into an implicit assumption.
At this stage, Bitcoin ceases to be credible infrastructure and becomes an administrable system.
This is why security cannot be treated as an optional extra or a tuning variable.
Rather, it is an embedded, indivisible and non-customisable public good.
Everything else (speed, convenience and flexibility) can be negotiated. This cannot be.
Therefore, the question is not whether Bitcoin is 'secure enough'.
Rather, the question is whether we are willing to accept what security really entails.
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