i will transfer about $300k tether from my trustwallet to coinbase wallet using either erc or trc.
if some one knows my both wallet address and time of the transaction; any how can that person do something about that transaction? steal, hack, freeze the account etc?
during the transaction or after?
I am not really an IT or blockchain expert but i don't think, that there is any way that a hacker can do anything to access your tokens or coins while they are transfered within the blockchain because to do that this would actually mean that the hacker could access the blockchain itself and if that would ever happen to a chain then this would be the absolute worst case and that blockchain would be dead instantly because it could not be used anymore.
The only thing than can happen is that someone gets access to one of your wallets and once the tokens have arrived they just take them and send them to their own wallet, but for that you also have to make a lot of mistakes before, like saving your private key on your PC and then the PC gets hacked or infested by a virus or something.