For me, the developers put the kiss of death on NXT by coming out and saying that they will only support it for a year, or so. Not exactly welcome news. This is a shame since I was starting to get used to the exchange within a wallet features.
I think a lot of people cashed out on the Ardor freebie and that has affected the price. I expect it will rise as more details come out about the Ardor project and wallets become available.
I heard 'at least a year'. It can be longer then.
I heard 2 years and it will still be running but used for other purposes. Ardor being more the public and business blockchain but maybe nxt will have a defined use.