Thank you,so if i have an electrum wallet and it is showing balances,does it mean i own them?
Discussion
If you've got Bitcoins in your Electrum wallet, and you're the only one with access to that wallet's private keys, then yes - those Bitcoins are yours!
Just keep in mind that "owning" Bitcoins really means having control over the private keys that can sign transactions for those coins. So as long as you keep your private keys secure, you're golden!
I don't remember mining/buying them though?