Hi ! Is this coin beign trade on anywhere or may i ask, whats the point of resurrecting an old coin?

Thank you !
Gapcoin is listed on Freiexchange -
https://freiexchange.com/market/GAP/BTC.
Gapcoin hasn't been resurrected, the community have been collectively contributing prime gap records continuously since the coin's launch in Oct 2014.
Gapcoin's proof-of-work is effected by searching for large prime gaps and the rationale for this is detailed on the gapcoin.org web site. I provide a summary for convenience:
prime number based p2p cryptocurrency, which tries to eliminate the sticking points of other scientific currencies like Primecoin or Riecoin.
[...]
The big improvement in comparison to Bitcoin is that instead of burning electricity for its own sake, Gapcoin's Proof of Work function actually does useful work by searching for large prime gaps.
[...]
Prime numbers are interesting for lots of mathematicians around the globe, and they're also important to every day cryptography (see RSA). Researches about prime gaps could not only lead to new breakthroughs in the bounded gap, it may also help proving the Twin Prime Conjecture and maybe even the millennium problem, the Riemann hypothesis. Who knows?"
If you're interested in further details, I recommend that you visit the site
Gapcoin currently holds the record for the largest prime gap with merit exceeding 40 (see also
https://primegap-list-project.github.io/)
Cheers
Graham