As long as your private keys are safe your bitcoin is safe. Because it is merely impossible to breach into another's wallet without knowing private keys. So keep your private keys safe. Best use offline wallet to ensure security.
I agree with you sir! Bitcoin can be safe if the one who handle your keys is only you and avoid suspicious transactions that might harm your wallet and bitcoin. I also advice to you that instead of using online wallet, use offline wallet to ensure your security and avoid from negative transactions.