Can you sign a message with the btc address associated with the account from going by your trust rating, 5 years ago?

I dont know if you are serious about that 5years you are saying, it is only a sr account so i assume that account is only 1year old

Can you sign a message with the btc address associated with the account from going by your trust rating, 5 years ago?

a friend gave me the account to sell it for him
I don't know how to sign a message sorry, tell me how to do that

You can google it if you really want. If you cant sign a message therefore it means that the account is possibly hacked