Dev you're doing it wrong. And I am gonna explain you why.
Premine compared to blocks reward is too high. For miners who rent hashes get even 100K will be very difficult and it will be overprice.
No one will spent so many BTC for rent.
To do it much livable, you must reduce premine to 50K and change block reward.
It's not 2012, no one will mine for a monts this coin.
the premine is allocated the investors who can not mining by the way .For example ipo and ico.
after a monts Will come some plan and try 。Because of no one will mine for a monts this coin.