Crypto bubble warning signs: ten markers from past manias
The essentials in 30 seconds
- Ten warning signs recur in past manias, and as of October 2026 you can score each as present, partly present, or absent.
- The 10 markers fall in 4 groups: prices and crowds, money, supply, and structure.
- A top score of 20 means every marker is fully present.
- A tally travels across tulips, shares, housing, and tokens, so readers in Singapore and Hong Kong can compare eras.
Crypto bubble warning signs are the habits of a market that has stopped checking its own prices. As of October 2026 this guide lists 10 markers drawn from past manias, groups them in 4 families, and shows how to rate each one. It belongs to the crypto bubble series, and the result is a tally you can repeat every quarter.
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What counts as a crypto bubble warning sign, and what does not?
A warning sign is an observable behaviour that appeared before earlier manias ended. It is not a prediction and it is not a price level. A sign tells you the odds have shifted, in the way a rising river gauge raises the odds of a flood without naming the hour. Each of the 10 markers below can be observed in public data or public talk.
Good markers share 3 traits. They are visible without insider access, they are defined before you look at the data, and they have appeared in more than one mania. A marker that fits only one story is a coincidence. A marker that fits tulips, shares, housing, and tokens points to something about people rather than about technology.
Which crypto bubble warning signs appear in prices and crowds?
Marker 1 is acceleration: each rise is steeper than the last, and the chart bends toward vertical. Marker 2 is the newcomer surge: app downloads, new accounts, and search interest climb faster than usage. Marker 3 is story over number: talk shifts from what an asset does to what its price will become, and nobody quotes output any more.
These 3 markers cost nothing to check. Open a chart on a log scale, compare account growth with active use, and read the last 10 posts about a token. If the posts discuss price targets and say little about function, rate marker 3 as present. If new accounts rise while active use stays flat, rate marker 2 as present.
Which crypto bubble warning signs come from borrowed money and promises?
Marker 4 is rising leverage: open interest and borrowing grow faster than prices. Marker 5 is the guaranteed return: products promise a fixed yield, often a high one, and describe it as safe. Marker 6 is paid enthusiasm: advertising, sponsorship, and celebrity endorsements arrive in waves, often from firms that earn fees when new buyers join.
A promise of safe high returns deserves the sharpest look. Returns come from somewhere, and when the source is new buyers, the promise lasts only while they keep arriving. Ask who pays the yield and what happens if deposits slow. If nobody can answer in 2 sentences, rate marker 5 as present.
Which crypto bubble warning signs show in the supply of new tokens?
Marker 7 is the flood of new products: launches multiply, copies of earlier tokens appear within days, and many exist only to be traded. Marker 8 is valuation by narrative: a young project reaches a large price on a story and a roadmap, before any user pays for anything. Both markers show that cheap creation meets eager demand.
Count launches per month and ask how many have users who pay. A rising count of launches with a flat count of paying users points to marker 7. For marker 8, write the annual output next to the price. When the output is blank and the price is large, the gap is the signal, and it grows when more such projects join.
Which crypto bubble warning signs hide in market structure and culture?
Marker 9 is concentration: a few wallets or venues hold most of a supply or handle most of the trading, so their choices move prices. Marker 10 is dismissed doubt: people who ask questions get labelled as people who do not understand, and the phrase this time is different appears in earnest. Closed debate is a cultural sign that weakness is being hidden.
Check concentration with public holder data and venue volume reports. Check culture by reading how a community answers a plain question about risk. A healthy community answers with data and admits limits. A community in a mania answers with slogans, and the slogan repeats across threads. Rate marker 10 as present when slogans replace answers.
How do you score the ten crypto bubble warning signs?
Give each marker 2 points when present, 1 point when partly present, and 0 points when absent. The top score is 20. As a working convention, read 0 to 6 as low risk, 7 to 12 as mixed, and 13 or more as high. The bands are a convention, so write them down before you score and keep them the same each quarter.
Record the date, the score of each marker, and one source per marker. Two readers should reach nearly the same tally from the same sources. When they differ by more than 3 points, the definition of a marker is too loose, and tightening it improves every later quarter. A tally with a record beats a hunch with a loud voice.
What should you do with a crypto bubble warning sign tally?
Use the tally to decide when to review, not when to act on impulse. A rising tally from one quarter to the next calls for a review of position size, borrowing, and the time you would need to sell. A falling tally calls for the same review, which keeps your plan alive. This page is general information, not investment advice.
False alarms happen. A market can score high for a long stretch, as markers describe odds and not dates. Pair the tally with your own limit: the loss you can bear without changing plans. The EQOS Asia method page shows how structured scoring works, and the EQOS Asia contact page books a 30-minute call to apply it to your case.
See also in this guide
Frequently asked questions
What are the main crypto bubble warning signs?
Ten markers recur in past manias: acceleration, a surge of newcomers, stories over numbers, rising leverage, guaranteed returns, paid enthusiasm, a flood of new tokens, valuation by narrative, concentration, and dismissed doubt. Score each one and read the tally, not any single marker.
Do warning signs predict a crash?
A warning sign shifts the odds and does not name a date. A market can show many markers for a long stretch before it falls. The tally tells you when to review your plan, your borrowing, and the time you would need to sell.
How do I score the markers?
Give 2 points when a marker is present, 1 point when partly present, and 0 points when absent, for a top score of 20. Write the bands and the definitions before you score, and record a date and a source for each marker.
Which marker is easiest to check?
Stories over numbers costs nothing to check. Read the last 10 posts about a token and see whether they discuss function or price targets. When price targets dominate and function is missing, rate the marker as present.
Test your knowledge
1. How many warning signs does this guide list?
- 10
- 5
- 20
Show the answer
10.
2. How many points does a present marker earn?
- 0
- 1
- 2
Show the answer
2.
3. Which marker describes a few wallets or venues holding most of the supply?
- Concentration
- Acceleration
- Paid enthusiasm
Show the answer
Concentration.
4. What does a warning sign tell you?
- The exact date of a fall
- That the odds have shifted
- The price of a token
Show the answer
That the odds have shifted.
5. What is the top score of the grid?
- 10
- 100
- 20
Show the answer
20.
About the author
Stéphane Jambu
President, EQOS Forecast Asia
Stéphane Jambu leads EQOS Forecast Asia and works as a consultant in e-commerce, search visibility, and AI. LinkedIn profile
Sources: EQOS Asia method page (eqos-asia.com/method.html) and contact page (eqos-asia.com/contact.html), consulted on 23 October 2026. Page updated on 23 October 2026.