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/TestnetNot 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.
