No.
As said Microsoft is stopping support for it meaning you wont get any future patches, security fixes. XP is very mature so most of the issues have been addressed already, if you've got a half decent firewall, anti virus and common sense then you should be safe on the net.
You will miss out of certain software that requires vista+ or win8+
End of the day if your current machine does what you want it to do then don't worry about replacing it or the OS just yet.