I just received a message from someone asking what scam is - and I realize that many people still don't fully understand the different types of scams in the crypto market. So today, I want to share what I know so that everyone can better protect themselves.

What is a scam? Simply put, it is fraudulent activity aimed at stealing your assets or personal information. Scammers often use very sophisticated tricks, knowing how to manipulate psychology to make you trust them and then drain your funds. According to data from Chainalysis, although losses from crypto scams have decreased significantly compared to previous years, they still amount to billions of USD each year.

The most common scam types I see are phishing - where attackers impersonate emails or websites of reputable exchanges to steal your account information. This method is very easy to fall for if you're not paying close attention.

Another type is pump and dump - project developers manipulate token prices, creating FOMO waves that make people want to buy quickly, then they sell all their tokens at high prices, leaving investors with worthless assets. This is quite common in new projects.

Then there’s OTC scam or P2P scam - where you trade directly with someone, and they ask for payment upfront then disappear or don’t send the correct amount. That’s why I always recommend using reputable exchanges as intermediaries for large transactions.

I’ve also encountered cases where celebrities are impersonated to promote "fake" projects. Or fake websites/apps of well-known wallets - for example, fake Ledger apps on app stores. Scammers are very creative in creating nearly perfect replicas.

Additionally, there’s the Ponzi scheme - where developers promise huge profits from crypto investments, but in reality, they only take money from new investors to pay returns to earlier investors. Eventually, when no new investors join, the scheme collapses and everyone loses money.

I remember major scams like Confio - they raised $375,000 via ICO at the end of 2017, then suddenly disappeared. The token price dropped from $0.6 to $0.1 in just a few hours. Or Centra - which raised $32 million, even supported by celebrities like Floyd Mayweather and DJ Khaled, but the founders were arrested in April 2018. BitConnect was even worse - they used a multi-level marketing model to scam many people, operating for about a year before an exit scam, with a market cap of around $2 billion.

How to tell if a project is a scam? First, if they promise unrealistically high profits without any real basis—that’s a red flag. Second, if the project lacks clear information about its business model, team, or investors—that’s very suspicious. Projects that focus only on marketing and advertising without a real product are also suspicious. If they don’t have security audits from independent third parties, the risk is very high.

I also check community feedback—if there are many warnings and negative comments on crypto forums or Twitter, I become very cautious. Another sign is if their domain name and logo are identical to those of major projects—that’s a common scam tactic.

Here are some tips to avoid scams. First, always do thorough research before investing—read the whitepaper, learn about the team, check reviews on CoinMarketCap and CoinGecko. Verify if the project has an official website, status page, and active social media accounts. Never share your private key or seed phrase with anyone.

Use popular, well-secured wallets—avoid unknown or unverified wallets. Enable anti-phishing codes and two-factor authentication (2FA) on exchanges. Keep your software and crypto wallets updated to the latest versions.

I also recommend diversifying your investments across multiple projects instead of putting everything into one. Be cautious with unknown links and messages—this is the most common way scams operate. Use antivirus and anti-phishing software to protect your devices.

A useful technique I’ve seen is "revoke"—after interacting with DeFi applications, you should revoke their access permissions. Even reputable apps like Uniswap or Balancer can have security vulnerabilities that hackers exploit.

You can check if a project is a scam by visiting sites like ScamAdviser, CryptoScamDB, or Coinopsy. There’s also Honey Pot to check tokens.

Remember, what is a scam and why is it dangerous? Because it not only causes you to lose money but can also erode your trust in the market. Crypto scams can be prosecuted in most countries, but recovering lost funds is often very difficult. If you get scammed and the funds are transferred to exchanges, contact the exchanges immediately to try to freeze the hacker’s account.

The most important thing is to stay vigilant and not let emotions or financial pressure influence your investment decisions. If in doubt, seek support from the community or professionals. Equipping yourself with knowledge to prevent scams is crucial to protecting your assets and personal information in this market.