Grandcoin pays a grand, that's why it's called Grandcoin. Nothing will change and there's nothing wrong with it.
The price is down 99.5% and quickly heading to zero.
Depends what you take as being 100%. If you take a top of 1000 sat yes then it's down 99%, if you take a bottom 18 nov 2013 it was 3 sat and it would be up 400%

I guess you just gotto wait for the next bullride. Stock up now and hold longterm, perhaps there will be new all-time-highs again above 2000 sat, no one knows, all altcoins are bottoming.