Bitcoin Is Bitcoin

Bitcoin is Bitcoin. Everything else is something else.

This starter kit treats Bitcoin as a category of its own. The phrase makes a precise distinction: understanding Bitcoin’s savings case means examining the particular system on which it rests.

Other cryptocurrencies can differ substantially from each other. None of those differences makes any of them Bitcoin. A similar logo, familiar terminology, or selected shared features do not transfer Bitcoin’s rules and history to another asset.

A particular network with a shared history

Bitcoin is a network that has existed since 2009. Its participants exchange transactions and blocks and verify a shared history, the blockchain. This records which bitcoin can still be spent and which conditions must be met to spend it.

Your wallet shows you a relevant part of this information and manages the keys that authorize spending. An amount of bitcoin belongs to this network and its history. It is not an arbitrary number that acquires the same meaning when someone attaches the name “Bitcoin.”

Imagine two separate transaction ledgers. Both might follow similar rules. An entry in the second ledger still does not become an entry in the first. Starting a new blockchain likewise creates no additional bitcoin in the Bitcoin network.

Shared rules and independent checks

Consensus rules determine which transactions and blocks are valid. They require, for example, that spending is properly authorized, already spent funds cannot be spent again, and a block does not create more new bitcoin than allowed.

Miners use computing power to propose new blocks through proof of work. Full nodes are computers running software that checks transactions and blocks against the rules. These are different jobs: a miner can create a block, and a validating node can reject it as invalid.

Among valid chains, a node generally follows the one with the most accumulated work. Even substantial computing power does not make a rule-breaking block valid to that node. Rules, verification, and work accumulated over time operate together.

New bitcoin follows an issuance schedule

New bitcoin is created through the block subsidy: the newly issued part of a miner’s compensation. Transaction fees come from existing bitcoin and do not increase the total supply.

The schedule began with 50 BTC per block. The subsidy halves every 210,000 blocks. Under these rules, the total newly issued supply stays just below 21 million BTC. The schedule depends on block numbers, not guaranteed calendar dates.

This limit can be verified. It does not promise a particular euro price. How much people will give for Bitcoin still depends on demand. That is why we have treated quantity and purchasing power separately.

The ability to verify

Bitcoin’s source code is public. Running a full node lets you check the blockchain you receive yourself, instead of accepting another service’s display as the final authority. That takes suitable software, resources, and some learning.

People apply the rules through their choice of software. Developers can propose and publish changes. A published proposal does not automatically change the rules your node accepts. Bitcoin’s continuity also depends on people continuing to use its shared rules.

Copying code does not automatically reproduce a network

Someone copying Bitcoin’s code and starting a different network does not automatically acquire its participants, transaction history, accumulated work, or acceptance. Even a copy with the same supply limit is a different unit in a different system.

That is the practical point of the phrase: Bitcoin is Bitcoin. Everything else is something else. When examining an offer, establish which network and which rules actually stand behind it. A similar name cannot do that checking for you.