Wrong question! Or else a pack of wrong answers!

1. A pop song CAN become traditional over 100 - 200 years, if it survives that long.

2. It can only become traditional pop, never folk, because it simply isn't folk.

"Traditional" is not a word that applies just to one kind of music in one culture. It is the application of the descriptor "Folk" which provides that link, and even with that the boundaries are fuzzier than some people would like.

Whether, or not, the pop song will ever become traditional is a matter for those in the future who choose to apply it as a descriptor because they wish to preserve it. Given the origins, it is extremely unlikely that they would want to call it anything other than "Traditional Pop".

Don T