Rug pulls & scams: the red flags
Most crypto losses aren't bad trades, they're scams. A "rug pull" is when a token's creators drain its value and vanish. The good news: they nearly always leave the same fingerprints.
The classic red flags
- Unlocked liquidity. If the team can withdraw the pool, they can pull the floor out overnight. Look for locked or burned liquidity.
- A mint function. Contract code that lets them create unlimited new tokens = instant dilution to zero.
- Holder concentration. A few wallets holding most of the supply can dump on everyone else.
- Honeypot. The contract lets you buy but blocks selling. Always simulate a sell first.
- Anonymous team + hype. No accountability plus manufactured urgency ("get in now") is the oldest pattern there is.
How to check
- Read the contract on a block explorer; use a token-scanner for mint/liquidity/tax flags.
- Check the holder distribution and whether liquidity is locked.
- Learn to read the code, the real defence: smart-contract safety (Cyfrin).
A checklist you can run in five minutes
Each of these is verifiable on a block explorer or a token scanner before you spend anything. One red column is usually enough to walk away.
| Check | Acceptable | Walk away |
|---|---|---|
| Liquidity lock | Locked months ahead, or LP burned | Unlocked, or lock expiring within days |
| Top-10 holders, excluding LP and burn | Under ~25% of supply | Above ~50%, or one wallet above 10% |
| Contract ownership | Renounced, or a multisig with a timelock | One anonymous key holding admin rights |
| Mint and blacklist functions | Absent, or permanently disabled | Present and callable by the owner |
| Buy/sell tax | 0–5%, and not changeable | Above 10%, or the owner can raise it later |
| Sell simulation | A test sell executes normally | Sell reverts: honeypot |
| Liquidity depth vs your size | Your exit moves price under ~1% | You are a meaningful share of the pool |
Note what this checklist does not prove. It shows the contract cannot be trivially drained today; it says nothing about whether the token has value, and an upgradeable proxy can change the rules after you have checked. Re-check before adding to a position.
If you can't explain where the yield or the value comes from, assume you're the yield. Slow down; the good opportunities survive due diligence.
Educational market information, not financial advice. Markets carry risk of loss, do your own research.