Tough decision. No one would blame you for quitting your phd to double your salary. Money isn't everything but that is a hell of a lot of money! Have you worked

Tough decision. No one would blame you for quitting your phd to double your salary. Money isn't everything but that is a hell of a lot of money! Have you worked as a developer before? Because working as a phd student is way different from working in the software industry. You may hate it. And returning to finish a phd is probably very difficult.