for me it seems with this "someone" you mean yourself... ? :-)

anyway.... 50% of one million coins is 500.000 coins = 2.5 btc if you sell for 500 sat.

i dont think this would crash the market - just now on bittrex selling 2.5 btc of voot would just bring the price down from 500 to around 480.
thats nothing. buy-support is huge now.

so people believe in this coin, no matter what fudders try. must be hard to take, so much effort for nothing.