Bitcoin is digital money that nobody controls — no bank, no government, no company. It lives on thousands of computers worldwide simultaneously. You can send it to anyone, anywhere, instantly, without asking permission. There will only ever be 21 million Bitcoin — that limit is written into the code and cannot be changed. This scarcity is why many people see it as "digital gold."

More people learning about and using Bitcoin = more demand. Fixed supply + growing demand = higher price. This has happened in every 4-year cycle since 2009. Short term the price is chaotic and emotional. Long term it has followed a remarkably steady upward trend — which is what the Power Law model captures.

A physicist named Giovanni Santostasi noticed that Bitcoin's price, plotted on a special log-log chart, forms a perfectly straight line over 15+ years. This is called a Power Law — the same maths that describes how cities grow, how the internet expanded, how biological organisms scale. It means Bitcoin isn't random: it follows a predictable long-term growth curve.

The green line is the "fair value" — where the model says Bitcoin should be. The red dashed line is historical resistance (where it tends to peak in bull runs). The green dashed line is historical support (where bear market bottoms tend to land). The orange line is the actual price.

When the price is below the green line, the model says Bitcoin is undervalued. When above, overvalued. Historically, buying during "undervalued" periods has always worked out over a 4-year horizon. This is not financial advice.

New Bitcoin is created as a reward for computers ("miners") that keep the network secure. Every ~4 years, that reward gets cut in half — this is the Halving. It's the mechanism that enforces Bitcoin's scarcity: the rate of new supply slows down predictably until the last Bitcoin is mined around 2140.

Every halving has historically been followed by a significant price increase 12–18 months later, as the reduced new supply collides with steady or growing demand. The next halving is in April 2028.

Bitcoin is highly volatile — it regularly drops 50–80% from peaks before recovering. If you panic and sell during a crash, you lock in losses. The people who have done well held for 4+ years through multiple cycles without selling.

Key risks: volatility (price swings), custody (if you lose your key, coins are gone forever), regulation (governments could restrict it), and the small chance the model is wrong long term. Only invest what you can afford to lose entirely, and never use borrowed money.

You don't need to buy a whole Bitcoin — you can buy any fraction. Steps:

1. Create an account on a reputable exchange (Coinbase, Kraken, or River are good starting points in the UK/US).
2. Verify your identity (required by law).
3. Deposit GBP/USD and buy however much you want.
4. For amounts you plan to hold long term, move it off the exchange onto a hardware wallet (Ledger, Trezor) — "not your keys, not your coins."

Many people use a strategy called DCA (Dollar Cost Averaging) — buying a fixed amount every week or month regardless of price. This removes the stress of trying to time the market.