Hey gusys,
Thanks to all of you, as written before, the priv key was beloging to a Stellar wallet (I forgot to have a XLM wallet). he funds have been already moved to another wallet for safety reasons afer importing the private key on a oniine wallet.
I was pretty lucky trying with that specific wallet and to be able to recover my funds even without remembering at what coin my wallet was beloging!
Thanks to all of you, as written before, the priv key was beloging to a Stellar wallet (I forgot to have a XLM wallet). he funds have been already moved to another wallet for safety reasons afer importing the private key on a oniine wallet.
I was pretty lucky trying with that specific wallet and to be able to recover my funds even without remembering at what coin my wallet was beloging!
Congratulations OP!!
For your own safety it is better if you don't disclose how many coins you recovered, but I hope that they are worth much money. Maybe sats would've been more profitable, but still! Unexpected money is always welcome
People out of here, stay away from any person asking to you your private keys, as the other said to me. Fortunely no one tried to contact me so far 
Perhaps because you solved your question very fast, and because the users in this forum are top notch
but it is always good to be cautious, just in case.