But if there are no miners in network,and it is fully 100% premined coins?
If there are no miners then you have created a terrible useless system. The whole Point of crypto currency is to use proof of work (miners) to verify transactions / keep the ledger legitate and prevent double spends ect. What you are talking about is Centralized monopoly fiat money , your basically trying to take crypto currency and turn it back into fiat USD . No one will want your currency. You could just make more, manipulate the ledgers, spend the same coins 1000 times .
You obviously have no idea what you are talking about, and te fact that you are talking about creating your own crypto currency when you don't even understand how crypto currency works , at all, is absolutely ludaciss . I suggest you pursue another career , like flipping burgers , honestly. I'm just trying to save you time and money . Because you are wasting your time. And mine quite frankly.