I am inclined to believe that NxT will continue its downward trend of losing marketshare in the crpto currency ecosystem however, but am open to changes.
How do you measure marketshare? Don't say that you visit
http://coinmarketcap.com, Paycoin at #4 is enough to prove that marketshare can't be measured this way.
Unfortunately, for the cryptocurrency eco-system that PoS scam coin does deserve a high market share as they have a large and loyal following and high liquidity. I would suggest their standing is artificially elevated above others due to manipulation in the monetary supply, but the same could be said about NxT where a few whales control most of the supply and the liquidity is pathetic.
Your point is still valid, as there are other indications to test market share like:
Merchant adoption, user adoption(very difficult to measure accurately), Venture capital investments, development involvement.
Google trends wont be accurate at all because NxT is mainly affiliated with WWE in searches.
One could use Alexa ranking though:
bitcoin.org Global rank 13,074
http://www.alexa.com/siteinfo/bitcoin.orgbitcointalk.org Global rank 4,405
http://www.alexa.com/siteinfo/bitcointalk.orghttp://nxt.org Global rank 451,998
http://www.alexa.com/siteinfo/nxt.orgnxtforum.org Global rank 197,055
http://www.alexa.com/siteinfo/nxtforum.orgpaycoin.com Global rank 138,714
http://www.alexa.com/siteinfo/paycoin.comhashtalk.org Global rank 28,827
http://www.alexa.com/siteinfo/hashtalk.orgThus much to our chagrin paycoin has stolen marketshare/mindshare from NxT as the evidence has provided.