if I've created account/wallet on coinbase or any other exchange then my account is hacked and my coins/money lost who are responsible for it
The Exchange where I've created account

is it my mistake

what's you thought about it

and how i make my account safe

I personally knew crypto since 2015 and started trading on several exchanges. And I'm grateful that until now my account is safe. The point is we must be careful when creating an account. for example by installing 2FA or other security. besides, remember never to give a gap, like clicking the wrong link. Some of my friends who have experienced most of them hacked by phishing. And of course, no one will be responsible for this matter unless you learn from experience and be more careful