BubbleHow to Read a Crypto Bubble Map
Open a crypto bubble map for the first time and it looks simple: a screen full of circles, some green, some red, some huge, some tiny. Read it for five minutes and it starts to make sense. Read this page first and it'll make sense in under two.
Each circle is a coin. Size tells you how big it is by market value. Color tells you which direction it's been moving. Everything else — dominance, volume, supply, FDV — is just detail that explains why a bubble looks the way it does. Below is what each of those numbers means and how they show up on the map.
Last updated: July 8, 2026.
What a Bubble Actually Represents
A bubble map plots coins as circles instead of rows in a table. Size maps to market capitalization; color maps to recent price change. That's the whole trick, and it's why the format works so well for scanning a market fast — a ranked list of 200 coins takes real effort to parse, a screen of bubbles doesn't.
Bitcoin and Ethereum sit at the top not because their price per coin is high, but because their total market value is. Filter the map by category, exchange, or time window and the same rules still apply — size is always cap, color is always change. See the live map here.
Market Cap
Market cap is what a coin is worth in total: circulating supply multiplied by current price. It's the number that actually tells you how "big" a coin is — price per coin alone doesn't.
A coin trading at $2 with 10 billion coins in circulation has a $20 billion market cap. A coin trading at $50 with 100 million coins in circulation has a $5 billion market cap. The second one costs more per coin and is still four times smaller.
That's the number bubble size is built from. It's also why the biggest circles on the map barely move in rank from day to day, while smaller ones shuffle around constantly.
Bitcoin Dominance
Dominance is Bitcoin's market cap as a share of the entire crypto market. Nothing more complicated than that — divide Bitcoin's cap by the total, multiply by 100.
Rising dominance usually means Bitcoin is holding up better than everything else, or falling less. Falling dominance usually means money is moving into altcoins — traders call that stretch "altcoin season." Either way, dominance says nothing about whether the market overall is up or down; it only says how the pie is split.
Trading Volume
Volume is the dollar total of a coin bought and sold over a period, almost always the last 24 hours. High volume means a coin trades easily without moving its own price much. Low volume means the opposite — a single large order can shove the price further than it "should."
Volume and market cap move independently. A coin can carry a huge market cap and barely trade that day, or a small market cap and suddenly see enormous volume because something happened. Comparing the two — volume against cap — is a fast way to tell whether a coin is quiet or unusually active right now.
Circulating Supply, Total Supply, and Max Supply
Three numbers, three different questions:
| Term | What it answers |
|---|---|
| Circulating supply | How many coins are out and trading today. This is what market cap is calculated from. |
| Total supply | How many coins exist right now, including ones still locked up or not yet released. |
| Max supply | The hard ceiling on how many coins will ever exist — 21 million for Bitcoin. Plenty of coins have no ceiling at all. |
The gap between circulating and max supply matters: a coin can gain market cap over time purely because more of its supply gets released, with no new demand involved. That's exactly what FDV is built to show.
Fully Diluted Valuation (FDV)
FDV answers a hypothetical: what would this coin's market cap be if every coin that will ever exist were already circulating today? Current price multiplied by max supply.
It's most useful on coins where circulating supply is a small fraction of max supply. A low market cap next to a much higher FDV means a lot of supply is still waiting to unlock — and unlocks tend to add sell pressure as they hit the market.
Why Bubbles Grow and Shrink
A bubble's size isn't fixed — it moves every time market cap moves, and market cap moves every time price does. That constant motion is volatility made visible: a coin spiking upward gets bigger and brighter green in real time; one dropping fast shrinks and slides toward red.
Small-cap coins swing harder than large ones, so if you're watching the map live, expect the small bubbles to be doing most of the jumping around while Bitcoin barely twitches.
Categories and Sectors
Coins get grouped by what they actually do — Layer 1 chains, DeFi protocols, meme coins, tokens tied to a specific ecosystem, and so on. Filtering by category strips out the noise of the wider market so you can check one corner of it on its own — useful when you want to know if DeFi is having a good week regardless of what everything else is doing.
Switch to a category view and the map behaves exactly the same way: size is still cap, color is still change, just scoped to that group. See category filters here.
Colors and Percentage Change
Bubble color reflects price change over whichever time frame you've selected — 24 hours by default, shorter or longer if you switch it. Green means up, red means down, and the shade gets more intense the bigger the move.
Check the time frame before you read too much into a color. A coin can be bright green on a 1-hour view and red on a 7-day view at the exact same moment — they're not contradicting each other, they're just answering different questions.
The Sparkline Inside Each Bubble
That tiny line inside each bubble is a miniature price chart — recent history compressed into one glance. It tells you the shape of the move: a steady grind up, a single sharp spike, a range going nowhere. Two coins can post the identical percentage change over a day and still have completely different sparklines — one boring and flat leading into a jump at the end, one jagged the whole way through.
FAQ
Does a bigger bubble mean a higher price?
No — it means a higher market cap. A coin can trade at a low dollar price and still have a huge bubble if enough of it is in circulation, and a coin can trade at a high dollar price with a tiny bubble if supply is small.
Why did a coin disappear from the map, or suddenly show up?
Bubble maps usually track a fixed top-N by market cap. A coin drops off if it falls out of that range, or if pricing data for it briefly stops coming through.
Does a big bubble mean it's a safer bet?
Not by itself. Size tells you current market cap, nothing about risk or where the price goes next. Large-cap coins tend to be steadier than small-cap ones, but that's a general pattern, not a guarantee, and none of this is investment advice.
How often does the map update?
That depends on how fast the underlying data refreshes for each coin. Prices update continuously as new data comes in.
Where does the price and market cap data come from?
From established exchanges and market-data providers. Numbers can differ slightly from other sites since every source calculates circulating supply and aggregates exchange prices a little differently.
Related: Crypto Market Terms Glossary — liquidity, slippage, TVL, tokenomics, gas fees, and more.