This only works if you bought the deluxe edition or higher version of Guild wars 2. We all know that the Golem banker is extremely useful while you're questing. It allows you to store things in your bank without having to teleport to another place to access it. The sad thing about the Golem banker is that it only lasts 4 days upon initial use.
Now here's where we get to always have it. Every time you make an alt, you get the mail saying hey blah blah blah, here's your free ring and golem banker. Complete the initial area, Go to the heart of mists, go through the lion's arch portal. Go to the bank and deposit the golem banker into your bank. Afterwards, delete the alt and do it over again. You can store as many Golem bankers in your bank as you wish. Now you have another golem banker for your main.
I'm currently storing more and more golem bankers in my bank, just incase they fix this.