Nothing is 100% safe in this world, so in order to minimaise the risk you have to have your private keys written in a piece of paper stored in a safe place away from your wallets adresses, and never put all the eggs in the same basket.
Yes there are many hackers in the world in different parts so it will very good that you can safe your account from hackers, that's why you should proper check your private key of your account because your money is your secure future and your family is depend on this.