If you're going to make these polls, they should actually make sense (bonus points if they were to have a purpose).
Obviously, one could not use XP "forever" (as a main, i presume that is what you are talking about). At some point it will become too difficult/impossible to use it for modern things, for even the most hardcore diehards. So that pretty much takes the first option off of the table for everyone. And presuming one didn't plan to use XP "forever" (or 2025, or 2023...rather inconsistent), switching to Linux is not the ONLY option. One could move to a newer Windows OS, they could use a Mac system, or any number of other things, should they stop using Windows XP.
(as a side note, i find your personal vote of "I will use it forever" extremely amusing, considering every other day, or perhaps even more frequently, it seems you are switching your Main OS.)
Personally, I'll hold out on XP until I can't anymore, whenever that is. I've got too much going on now to give more worry about the future than I already do.