I have an iPhone 7 and it works fine, it's also paid off. Should I upgrade to the iPhone X or save my money m?

I have an iPhone 7 and it works fine, it's also paid off. Should I upgrade to the iPhone X or save my money m?

Read more: https://iphoneus.org/faq/i-have-an-iphone-7-and-it-works-fine-it-s-also-paid-off.html