Live, glanceable bitcoin data — no login, no fluff, updated every time you load the page. None of this is investment advice: these are popular community models and metrics presented for education. All models are wrong. Some are useful.
NEXT HALVING
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Counting blocks…
FEAR AND GREED INDEX
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Crowd sentiment, 0 (max fear) to 100 (max greed). Contrarians read it backwards. Source: alternative.me
MAYER MULTIPLE
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Price divided by the 200-day moving average. Created by early bitcoin advocate Trace Mayer. Readings under 1 meant buying below trend; historically, above 2.4 meant things were getting silly.
THE PIZZA INDEX 🍕
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On May 22, 2010, Laszlo Hanyecz paid 10,000 BTC for two pizzas — the first real-world bitcoin purchase. This is what those pizzas are worth at today’s price. Never sell for pizza.
BITCOIN DOMINANCE
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Share of total crypto market value held by bitcoin.
MORE TOOLS INCOMING
This bench has empty seats.
Dominance, hashrate, realized cap, the pizza index — we are stacking tools the way you stack sats. Have a favorite metric you want built? Request it.
THE HINDSIGHT MACHINE 🔮
Everyone has a “I almost bought bitcoin in…” story. Find out exactly how much that nap cost. Uses real historical prices; educational regret only — not investment advice.
If I had bought $of bitcoin on
THE SAT STACKER SIMULATOR 🧱
The Hindsight Machine is for lump-sum daydreams. This one tests the boring plan: buy a fixed amount on a schedule, never look at the chart, repeat. Real price history, real math — not investment advice.
Every bitcoin key that has ever existed is just 256 random bits. Randomness is not a detail of wallet security — it is wallet security. Make some, right now, with your hands.
🔒 A toy, on purpose: everything happens in your browser, nothing is stored or sent, and it will never show seed words or key material. The reason why is the lesson.
0 / 256 bits
Mash your keyboard. Scribble your mouse in the box. Tap your screen like it owes you money. The microsecond timing jitter of your chaos becomes randomness.
waiting for chaos…
🎉 256 bits of certified* chaos (*certified by you)
The pattern above has never existed before in the history of the universe, and it will never exist again. Here is the size of the haystack a 256-bit key hides in:
2256 = 115,792,089,237,316,195,423,570,985,008,687,907,853,269,984,665,640,564,039,457,584,007,913,129,639,936 possible keys
That count of keys is within spitting distance of the number of atoms in the observable universe. Guessing a key is not “hard.” It is not a thing that happens in this universe.
So why not just generate keys right here?
Because to trust a key born on this page, you would have to trust this website, your browser, every extension inside it, your operating system, and every program that has ever run on this machine. That is a long list of strangers. A hardware wallet shrinks the list to one dedicated chip — a certified random number generator in offline silicon that does nothing else all day. That is what the Secure element column on our comparison table actually means.
Type 30 “random” characters below. No thinking. Pure chaos. We will grade you.
0/30
MOSCOW TIME ⌚
Bitcoiners price the dollar in bitcoin, not the other way round. “Moscow time” is satoshis per dollar — so named because the number happens to read like a clock. This one is live.
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winding the clock…
SATS PER DOLLAR · LIVE
The converter
$⇄sats
Tap an item to load it. Once a coffee costs “about eight thousand sats,” you have started thinking in the unit — that is the whole trick.
Bitcoin’s entire price history on a log scale, wrapped in bands derived from a power-law fit of price versus network age. Lower bands historically marked accumulation; upper bands marked euphoria. A model, not a promise.
NETWORK HASHRATE
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Hashrate is the computing power securing bitcoin — the physical, electrical cost an attacker would have to out-spend. No advice here: the history is the argument, whichever way you read it.
THE EXCHANGE GRAVEYARD 🪦
$18,000,000,000+
Customer money buried below, valued at the moment each door closed — substantially more at today’s prices. Every name here was once somebody’s “totally safe” exchange.
⚰️ Tap a headstone for the cause of death.
R.I.P.
Bitcoinica
2011 – 2012
≈102,000 BTC
Robbed three times in one year. After the third, there was nothing left to rob.
R.I.P.
Mt. Gox
2010 – 2014
850,000 BTC
Once handled 7 in 10 bitcoin trades on Earth. About 140,000 coins later turned up in an old wallet. The rest never did.
R.I.P.
BitConnect
2016 – 2018
≈$2.4B
Guaranteed 1% daily returns. The guarantee was the red flag.
R.I.P.
QuadrigaCX
2013 – 2019
≈C$215M
The founder died abroad holding the only keys. Investigators opened the cold wallets anyway — they had been empty for months.
R.I.P.
Cryptopia
2014 – 2019
≈$16M
Breached twice in two weeks. New Zealand’s largest exchange became New Zealand’s largest liquidation.
R.I.P.
Livecoin
2013 – 2021
Undisclosed
Attackers seized the servers and set bitcoin’s price to $450,000 while they drained it. Never reopened.
R.I.P.
Thodex
2017 – 2021
$13M – $2.6B
Estimates of the loss vary by 200x depending who you ask. The founder’s prison sentence was more precise: 11,196 years.
R.I.P.
Celsius
2017 – 2022
≈$4.7B
“Unbank yourself,” the ads said. Eventually, involuntarily, 600,000 accounts did.
R.I.P.
Voyager
2018 – 2022
≈$1.3B
Promised safe harbor, then lent the deposits to a hedge fund that was already underwater.
R.I.P.
FTX
2019 – 2022
≈$8B
The most trusted name in crypto, per the ads. An eight-billion-dollar hole, per the auditors.
R.I.P.
BlockFi
2017 – 2022
$1B+
Died of proximity to FTX. In crypto, contagion is also a chain reaction.
R.I.P.
Prime Trust
2016 – 2023
≈$85M
A professional custodian that lost access to its own cold storage — then quietly used new deposits to cover old withdrawals.
Not your keys, not your coins.
Every one of these graves was dug by the same shovel: customers left coins on someone else’s ledger. Hardware wallets exist so your name never ends up on a headstone here.
Halving countdown pulls the live block height from mempool.space. The estimate assumes ten-minute blocks, so it drifts slightly as real blocks come in faster or slower.
Fear and Greed is the classic crowd-sentiment composite, from 0 (maximum fear) to 100 (maximum greed). Contrarians famously read it backwards.
Rainbow chart wraps bitcoin’s full price history in bands around a power-law fit of price against network age — the community’s favorite way to visualize whether today is expensive or cheap relative to trend. Hover anywhere on the chart to read the exact values.
Mayer Multiple, created by early bitcoin advocate Trace Mayer, compares price to its 200-day moving average — perhaps the simplest overheated-or-not gauge ever devised. We also compute how today’s reading ranks against every day since 2010.
Pizza Index is a memorial, and a warning.
Dominance is bitcoin’s share of the entire crypto market’s value — when it rises, capital is consolidating into the original.
Hashrate is the total computation racing to mine the next block, from blockchain.com data. The chart is log-scale, because linear scale cannot hold fifteen years of exponential growth on one screen.
The Hindsight Machine replays any purchase date against real market history (blockchain.com data, nearest recorded price to your date). It is a museum of missed naps, not a projection of anything.
The Sat Stacker Simulator replays a fixed-amount buy schedule (dollar-cost averaging) against real price history, and pits it against a 4% savings account for honesty. Past performance is not a promise — the boring plan just has the best publicist.
The Entropy Playground turns your mashing into measured randomness: the microsecond timing jitter of each press is mixed into a 256-bit pool, credited a few conservative bits at a time — the same philosophy real signing devices use, minus the certified silicon. It never produces seed words, deliberately. No browser should, and that is the whole point.
Moscow Time is satoshis per dollar — the price with the fraction flipped the way bitcoiners read it, named for the way the number happens to resemble a clock. The converter and the everyday-price chips are there to make sats feel like a real unit, and the projector answers the question every maximalist’s watch is quietly asking: at what price is one sat worth one cent?
The Graveyard is the reason this site exists. Twelve exchanges, twelve promises, roughly eighteen billion dollars of other people’s money. The pattern never changes — only the logo does.
