Reminder: TestNet coins have no value whatsoever, don't get scammed.

[Coding Enthusiast]

TestNet is an alternate network with the same consensus rules as MainNet and some differences such as being easier to mine, allowing non-standard transactions,... as the name suggests, it exists to help developers test their code without worrying about the costs.

Because of that, the TestNet coins have no value. Be careful not to get scammed like this.

TestNet coins are also easily distinguished since the wallets are different (need to create a new special TestNet wallet) and the addresses use different format (start with: m or n instead of 1 for P2PKH, 2 instead of 3 for P2SH, and tb1 instead of bc1 for Bech32).

https://en.bitcoin.it/wiki/Testnet

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[noormcs5]

TestNet is an alternate network with the same consensus rules as MainNet and some differences such as being easier to mine, allowing non-standard transactions,... as the name suggests, it exists to help developers test their code without worrying about the costs.

Because of that, the TestNet coins have no value. Be careful not to get scammed like this.

TestNet coins are also easily distinguished since the wallets are different (need to create a new special TestNet wallet) and the addresses use different format (start with: m or n instead of 1 for P2PKH, 2 instead of 3 for P2SH, and tb1 instead of bc1 for Bech32).

https://en.bitcoin.it/wiki/Testnet

Not only bitcoin, Ethereum also have a testnet which is termed as  ropsten and it has its own explorer https://ropsten.etherscan.io/
A few months back someone contacted me from telegram and told me that we want to sell his ETH urgently at a lower market price and later on i discovered he was given it on the testnet. Since i knew about this before, i was saved but don't know how many newbies get fooled from this.

[bitmover]

This is new
How people get a TESTnet wallet and think that it is ok.

When dealing with crypto I think that most people just think "easy money, quick rich scheme" and act so careless...
When I bought my first bitcoin I read a ton of articles about which exchange to use, which wallet to use and so on..

[Coding Enthusiast]

This is new

Not as new as you might think. We are using TestNet "3" for that reason. It has happened before on a larger scale and nowadays I am seeing an increase in some suspicious activities involving TestNet coins which is why I decided to start this topic.

[BlackHatCoiner]

In the bitcoin wiki it says that the current network of testnet is Testnet3. People that had access to testnet2, still have it right? But their coins are useless.

[HeRetiK]

In the bitcoin wiki it says that the current network of testnet is Testnet3. People that had access to testnet2, still have it right? But their coins are useless.

In theory you should be able to access testnet2 by running an old Bitcoin client that has the testnet Genesis Block set accordingly:
https://bitcointalk.org/index.php?topic=1261303.0

Not sure if there's much of a network left to sync with though, assuming network discovery even works.