For the first few days it was a normal Electrum Wallet. Then I made it a read only wallet and deleted the first one
Did you mean the cold wallet is already deleted? And you are only just using the watch-only to track transactions? If so, it is safe. But, did you generate the wallet completely offline? That is what totally makes it cold wallet (I mean the deleted wallet).
Also, make sure you protect your seed phrase, try to triplicate it and store it in different locations offline. If you lose access to your seed phrase, you lose access to your coin when ever you want to recover your wallet.