<prompt> Human: Im hoping someone can help me understand more responsibly if keeping my current phone selling it would a good idea vs getting the new iPhone X. Ever since I got the phone iPhone 6 Ive kept it in a waterproofshockproof case and it works perfectly. A bit slow, probably needs a new battery upgrade, but otherwise runs fine. Am I better of using this phone till its literally dead, or selling and getting the iPhone X? Im really hoping to understand the theory of doing this... I understand people do it with everything like cars, tools, etc. Age - 21Rent - 1200Income - 102k Software developer, dropped out, got an early startSavings - Not that good. Started making 65k when I was 18 and spent recklessly. Paid off all debt now saving about 800m. About 10k in all accounts total IRA, 401k, savings  <response>: It will never be the best financial choice to upgrade something that serves its primary function perfectly well. People still do it though. Is it worth it to you to have the newest, shiniest thing? What other goals would you be sacrificing for this? 