There already was an antimatter coin..
Antimatter Official Development and Release
https://bitcointalk.org/index.php?topic=247585.0
Antimatter Official Development and Release
https://bitcointalk.org/index.php?topic=247585.0
Well that would put a damper on things.... but (I hope) it looks like they have integrated the 'other' antimatter project into Noirbits and dropped the name.
Quote
Integrated with my Noirbits project as NoirTokens, release is early in january. check The Black Watch thread for updates.
Hopefully that means I won't put anyone's nose out of joint by reviving the name antimatter in a different way.
Make it 2x as divisible as bitcoin.
Yeah I was thinking minimum 8 decimal places but perhaps 16 would be even crazier.
make it use negative numbers 
So if you buy Antimatter you'd own less than when you didn't have any, not bad