Bitcoin is a shared ledger that nobody owns. Every participant keeps a copy, and new pages (blocks) are appended roughly every ten minutes. The clever part is not the cryptography - it is the agreement rule: the version of history that counts is the one with the most computational work behind it.
Mining, in one paragraph
To append a block you must find a number that makes the block's fingerprint start with enough zeros. There is no shortcut; you guess, billions of times a second. That wasted effort is the point - rewriting old history would mean redoing all of it faster than everyone else combined. Whoever succeeds is paid in newly issued bitcoin plus transaction fees.
The supply cap
Issuance halves roughly every four years and stops at 21 million coins. That rule lives in the software rather than in an institution, which is the feature its holders care about most. Whether a fixed supply makes something valuable is a separate question, and not one arithmetic can answer.
What it is not
It is not anonymous - the ledger is public and addresses are routinely linked to people. It is not cheap or fast for small payments. And it is not a company: there are no earnings, no cash flows and no dividends, which is exactly why the tools used to value a business do not transfer to it.
Where we stand
We publish no crypto strategy and hold no crypto in any allocation. This article exists because the mechanism is worth understanding, not because we think anyone should own it. The reasoning is in why we publish no crypto strategy.
Educational material - not investment advice.