So 360 million tokens for sale.

Any tokens out of the 360 million that are not sold are locked until the 27th September 2018.
Also 100 million for the team are locked until the 27th September 2018.

Doesn't this mean that potentially there could be hundreds of millions of tokens dumped on the market on the 27th September 2018?

Surely you need to extend this lock in period and also introduce a vesting period?
Alternatively why don't you burn the unsold tokens?

I don't understand why do you need to create 500 million in the genesis block?