Changes · versions

What's new

New pages, data and features on ONLY21

v3.6.0

Purchasing power explorer, time machine & a consistent design

New purchasing-power comparisons, fewer but more complete pages, and a design that works the same on every page.

  • Purchasing power explorer: how much purchasing power the euro and the dollar have lost since 1999, compared with cash, savings accounts, gold, a global equity ETF (iShares Core MSCI World) and Bitcoin, from a start year you choose
  • Homepage: "Where does Bitcoin stand today?" shows cycle, market regime, power law and weekly RSI each on a scale. The same cards appear on the cycle, power law, RSI bottom and analysis pages
  • Time machine: Bitcoin 1, 2, 3, 5 and 10 years ago on one page, with multiple and return per year
  • Merged: price history and yearly returns with a new price chart since 2010, the halving simulator on the halving page, address check and balance in one tool. Old links lead to the new page
  • Consistent: the same tooltips in every chart, new input fields that accept numbers only, and result tiles whose values line up
  • Converter and halving simulator follow the currency selected at the top
  • Corrected price data: timestamps from 2012 to September 2024 were 4 or 5 hours late, depending on the season, euro values now use the ECB daily rate throughout, returns are computed per currency
  • Removed: whale tracker, records, price milestones, 1 Bitcoin in USD and the separate Fear & Greed page. The Fear & Greed reading stays on the analysis page
v3.5.0

Homepage & charts

The homepage now shows current values instead of only pointing at them, and the charts say what they show.

  • Homepage: every statistics card carries its current reading, with a snapshot of the four cycle signals above it. Statistics now come before the calculators
  • Charts show prices in the currency selected at the top, not only in US dollars
  • Power law and RSI bottom: the zones and bands are named in the chart and the current one is highlighted. Instead of "percentile" they now state how much of the history sits in each band, with a new FAQ on how that works
  • Bitcoin cycle: the chart starts at today rather than at the run-up, and draws the three past cycles in separate colours
  • Prices below one euro (2010 to 2012) are shown with real decimal places
  • Dark-mode colour fixes: the tension map and the mempool views were tuned for light backgrounds only
v3.4.1

Polish

Fixes after the network & mining release, plus values that keep themselves current.

  • Mining stats: history now fully from our own node; energy value in appropriate units for the early years too
  • New FAQ answers: price behaviour after past halvings and "is the 4-year cycle still valid?"
  • The site now computes the halving countdown and cycle multiples itself, so no number goes stale
  • Dark mode: menu dropdown shadow fixed
v3.4.0

Mining stats & our own network data

The full history of difficulty and hashrate since 2009. All-time high and low now come from our own database.

  • New mining stats: difficulty & hashrate since 2009, plus hash price, attack cost, blocks/day and energy value; you can switch the metric freely
  • Network data now lives in our own database: backfilled once from mempool.space, kept current from our own node
  • All-time high & low from our own database: the low goes back to the real 2010 value (~$0.05), not just to 2013
  • Live dashboard tidied up: network metrics grouped together, fine dividers in the panels
v3.3.0

Sats purchasing power & halving simulator

Two new tools: what a fixed amount of sats was worth over time, and how the next cycle might look.

  • Sats purchasing power: nominal and real (inflation-adjusted) value of 100k sats over time, plus in gold and €/$ against Bitcoin
  • Interactive: pick the view, region (CPI/currency) and sats amount
  • Halving simulator: play through the next cycle (after the 2028 halving) with your own damping; the result is your assumption and not a forecast
  • Cleaner menu: separate "Tools" and "Statistics" sections
  • Bitcoin price from our own database; inflation from FRED, gold from Yahoo Finance
v3.2.0

Cycles & signals: four new analyses

Four new pages show Bitcoin patterns from our own database: halving cycles, RSI bottoms, seasonality and a valuation corridor. The values are computed from historical data and are not a forecast.

  • Bitcoin cycle: past halving cycles compared, the current phase and an analog outlook
  • RSI bottom signal: every weekly RSI low since 2011 and what price did next, historically
  • Seasonality: monthly returns as a heatmap with the best and weakest months
  • Power-law corridor: the long-term trend as a valuation band that shows where the price sits relative to its historical trend
  • Interactive charts with details on hover
v3.1.0

Price history back to 2010 & real euro rates

Price data now reaches back to the start of trading in 2010, and every euro value uses real historical ECB reference rates instead of an approximation.

  • New pages: Bitcoin return 2010 & 2011
  • Euro values day-accurate from real ECB reference rates (no more flat factor)
  • Currency can now be switched on every page independently of the language
  • Live numbers on the dashboard and stats bar animate on change
  • Our own Bitcoin node as the primary network-data source (mempool.space as failover)
v3.0.0

Launch of "The 21 Data Lab"

With version 3.0, ONLY21 is a Bitcoin statistics site built on its own database: EUR-native, cookieless, no paywalls.

  • Calculators: DCA, what-if, converter, fees
  • Live network data: dashboard, mempool, Fear & Greed
  • Our own statistics: price history, volatility clock, whale tracker, all-time high, halving and more
  • Node explorer with our own world map of reachable Bitcoin nodes
  • Statistics computed deterministically from our own price database