Before looking at fund flows, get the basics straight. Today, let’s talk about digital signatures.
Ethereum transactions include a chain ID (EIP-155), so a signed transaction cannot be replayed on another chain.
Before signing, check the operation type, contract address, and amount shown in the pop-up. If you don’t understand them, don’t sign.
When transferring $BTC , your wallet uses your private key to sign the transaction, and nodes across the network verify the signature using the public key.

This is not financial advice. You are responsible for any gains or losses.