Now i am use Myetherwaller, I find it very safe and secure and many people are using it, if i don't share my wallet to anyone, why hackers can steal my coin?
You can get to the phishing site (it's a human factor) or your computer can be hacked.
Currently it is difficult to be hacked because there are many programs that prevent malware. So I see very few cases of hacking and losing all money. Most hacked people have revealed their private keys to the outside