every halfing is happen the price is always grow up and it is so good time to sell.
look how LTC is grow so fast when it got some halfing.
i believe in 2020 when BTC is halfing, it will be a masterpice of cryptocurrency.
i believe with that.
https://bitinfocharts.com/comparison/litecoin-hashrate.html#3mWhat happened was that hash rate decreased for 20%. Miners got half less coins so some of them stopped mining. Halving can influence on two way, not just a price increase.