Although most coins were sold to Big investors , price is going down as today it dropped like 15% , i know it already made like 4x ,But Big investors supposed to Be a holders and not just sell when price go up ! . something is going on 
Actually, big investors dump their shares, buy another coin (was tether) and then rebuy after the crash they largely caused is over. But I agree, movement on NCASH is kinda weird, but then it's been that way since Jan. with other ICOs.