Bitcoin’s supply cap is not a promise or a roadmap slide. It is code. Satoshi Nakamoto set a maximum of 21 million bitcoin, and the protocol stops creating new coins once that number is mined, according to The Block.

After the last bitcoin is produced, miners no longer receive block subsidies. The Block frames the key shift like this. With the supply cap reached, “no new bitcoin will ever be created.”

That changes incentives, not the existence of the network. The Block also says the system is expected to keep operating “much the same as it does today,” even after the 21 million limit is hit.

Mining incentives get narrower

Today, miners earn a mix of block rewards and transaction fees. The Block’s explanation centers on what ends first. The block subsidy tied to newly minted bitcoin. When the last coin is minted, that subsidy disappears.

Miners would then rely on transaction fees to cover costs. The protocol still needs block production to confirm transactions and secure the chain, but the economics move from subsidized issuance to fee-only revenue.

The chain still needs blocks

Nothing about the 21 million cap implies that nodes shut off. The Block’s premise is that Bitcoin continues like it already does.

Operationally, the network still has to validate blocks, propagate transactions, and follow consensus rules. Those rules do not depend on whether new coins are being issued. Consensus is still consensus.

Fees become the funding source

The Block’s account points to the practical outcome. If new bitcoin cannot be created, the only remaining way for miners to earn from work done on-chain is transaction fees.

In other words, the security budget changes. Instead of issuing coins to fund mining, Bitcoin routes more of the burden to fee markets.

That is not an automatic guarantee that mining stays cheap or that fees stay low. But it does mean the protocol’s end state is clear. Supply ends. Block subsidy ends. Ongoing operation depends on fees.

Why “network keeps operating” matters

The Block’s emphasis on continuity is the important bit for readers who assume the cap is an off switch. It isn’t.

Bitcoin reaching 21 million does not mean consensus halts. It means issuance halts. The network’s value proposition still lives in transaction settlement and censorship resistance, while the cost of securing the chain migrates from block rewards to transaction fees.

If you’re building on or around Bitcoin, the relevant question becomes how fee-driven incentives sustain block production once issuance is gone.

The real risk is economic, not mechanical

The Block’s text you provided is focused on the supply limit’s effect on coin creation and ongoing operation. It does not quantify how fees would evolve, or what miner behavior would look like in the long term.

So the mechanical story is straightforward. The economic story is the one people will argue over.

Once you remove the block subsidy, miner incentives get stress-tested by demand for block space. That means the main uncertainty after 21 million is not whether the chain can keep running. It is whether fee levels stay sufficient to attract and retain enough hashing power to keep the network secure.

The protocol can keep producing blocks without new supply. The economy has to decide whether miners still want to.