Advice for those conducting cash to crypto purchases

1. The Initial Satoshi Test
Start by asking the person to send a test Satoshi (a small amount of crypto). However, verify an essential detail: is the sending wallet a personal wallet or an exchange wallet?
How to tell: Check the transaction history on the blockchain. If the number of transactions is astronomical (hundreds of thousands) and occurs every few seconds, it belongs to an exchange.
Personal Wallet: If the transactions are few and there are significant time gaps between them, it is a personal wallet.

2. The man in the middle or triangle scam
This is a sophisticated trick involving three parties: the Scammer (A), the Seller (B), and the Buyer (C).
The Scheme: The scammer contacts the seller (B) pretending to be a buyer, and contacts the real buyer (C) pretending to be a seller. He tells the seller that his representative (who is actually the real buyer) will meet him to deliver the cash. He tells the buyer that his representative (the real seller) will meet him with the crypto.

The Trap: The real buyer and seller meet, both thinking the person in front of them is just a representative. After the seller confirms the cash. If the seller send a 10$ test, the scammer will aslo send the $10 test from his own wallet to the real buyer to confirm it works. Once the buyer confirms receipt, the seller sends the full amount to the scammer’s wallet, and the scammer vanishes, leaving the buyer and seller in a financial dispute.

How to avoid it: Always ask the person standing in front of you for their wallet address directly. Never send funds to a wallet address sent to you via chat or third party apps. If the person meeting you truly is a representative for (real buyer) but who knows nothing about crypto, ask for the contact details of their boss if it is different from the person communicating with you then provide the wallet address to them directly. Alternatively, ask the representative to request the wallet address from their boss on their own phone, then compare the address on their screen with the one you have.
As a buyer, you must also show the person in front of you your wallet address and clarify that they must send the crypto to this specific address only, otherwise, you will not hand over the cash.

I have qustion :Who is to blame in this scam, the seller or the buyer ?

3. The Modified Counting Machine Scam
The seller brings a modified money counting machine that contains a hidden compartment filled with counterfeit bills.
The Scheme: As the machine counts your real cash, it funnels the real money into a hidden internal storage and replaces it with counterfeit bills from its pre loaded stash. The seller then cancels the deal for any random reason. You leave thinking you still have your cash, but you are actually holding fakes.

How to avoid it:
ATM Method: Go to the nearest ATM with the seller. Use the ATM to count the cash by starting an deposit process but hitting cancel before confirming the deposit. This uses the bank’s highly secure sensors to verify the bills.
Your own machine: Bring your own counting machine.Count the money with yours first, then let them count with theirs. If they try to cancel the deal after using their machine, recount the money with your machine immediately. If the bills suddenly show as counterfeit, grab the seller’s machine you will likely find your real money hidden inside it.

4. The Runaway Scam
This sounds simple or even silly, but do not underestimate it.
The Scheme: The seller claims to have an office and asks you to meet him there. He picks a spot near an office complex but specifically in an area with no security cameras. Someone approaches you, claiming they need to verify the cash is present before heading up to the office. The moment you hand over the money, they sprint to a waiting getaway car with the engine running and the door open.

How to avoid it: These scammers are often professional runners.
Ensure the meeting takes place in a spot where running is difficult.
Only hand over the cash while the other person is seated.
Most importantly, always meet in a busy, public place with plenty of witnesses.

People forgot there's a super easy way to prove that the wallet they're about to use belongs to them. And that's just by asking them to sign a message that you can verify.

Why trust the person to say they're not using an exchange wallet? Just ask for message for them to sign, you verify. 5 seconds.

When you are trying to purchase crypto you can have different options and most of your recommendations are a p2p trades which is conducting into an online or even physical meet up. But also you can use this too in a way of using of a centralized exchange with this the platform have their KYC submitted so you can also report them if they did not release the funds. Now just the cons of the CEX is having a mandatory submissions of your personal information now if you are quite sensitive with your data is you can use a DEX which is just making a transaction send destination address, send the amount and receive to your wallet. Now if you really wanted to push the p2p you need to consider they are trusted such as having a signed with their address or do a small amount only and do large if only a meet up.

Quote from: Peanutswar on April 04, 2026, 10:41:25 AM

The best is to used an exchange that are very common to them where verification would be that easier for him, I don't know a Dex that are supporting p2p apart from Bybit or bitget.
But op has to be extremely cautious since he hasn't used it for the first time, he could likely get scammed so easily, so what to do is to locate someone who is from their local board and then buy Bitcoin directly from that person only from a reputable p2p service provider.

When we want to trade regardless of the coin we have in mind, we must ensure that we have more information about the market we are going for and also have a particular strategy we use that will not affect us at the end, doing things intentional will make us achieve what we intended to get, but when we are less informeded and don't know what is at stake, we may experience otherwise, knowledge is profitable for those who seek it and it will help them in every thing they do regarding cryptocurrency, this already explain it all.

Quote from: slaman29 on April 04, 2026, 08:39:50 AM

It's true but only one of the many measure to take when conducting cash to crypto purchase because the seller can hold the fund or even scam because they are the one receiving the other party money first.
Better way is to use a P2P market place where they have some kind of escrow mechanism programmed into their app, maybe even using bybit's P2P market place if you want a more centralized solution just for the sake of avoiding scam.

Quote from: slaman29 on April 04, 2026, 08:39:50 AM

As far what understand about signing a message is that not all wallets have them, correct me if i'm mistaken.

1. Is it important to know the type of self-custody wallet or not since you're acting as the recipient of coins? Are there any advantages or disadvantages?

2. Almost all Android wallets have a built-in QR code generator for receiving Bitcoin, which is the most convenient way to send Bitcoin for face-to-face transactions. Who's to blame? Both of them, because they're both stupid.
Furthermore (for cases 2 through 4), this type of transaction is not recommended for physical security. If you must, do it at least at a police station and have one of the officers record it. If both (buyer/saler) are honest, they won't mind.