About to sell my 2013 rMac. Is 3 pass zero enough?

I plan on selling my late 2013 rMBP soon. I was wondering what your opinions are on me using a 3 pass zero on a SSD? Is it enough? I do have some sensitive data on there (bank info, passwords to important things at work, etc.). I also don't want to damage the SSD because I hear these passes can hurt the hard drive. Apple said that I don't even need to do that because SSD are just that great. Is that true?

Thank you.