There are 2 use cases for safecoin.
- Payment for network resources -
Let me re-frame your question. Blockchain coins do not have coin destroy, they are just printing more and more. The less they are printing(like bitcoin halving) the more is price pushing up. Mining of coins means that at any point in time, all time stored data + whole network infrastructure maintanance has to be covered by newly minted coins. So in fact if network is successful all hardware on it has to be paid by coins created as reward to miners. The more all network hardware cost are, the more should coins be worth and vice versa.
- Any other payment services. Since safecoin will be anonymous, with 0 fees and will allow micro-transactions in real time, it will be the only choice for micro transactions on both Safenet and old Internet.
Coins used in second category will not be spend for hardware resources but will be used as real money. People will not destroy them, so network will not be able to use them as reward for miners. The more coins will be in this second category, the less will be available for destroying and mining in the first category.
So, let say, if first category will be 90% of whole safecoin economy than it should be much cheaper than if it is only 10%. On first day of the network category all coins will be in first category, but in long term the more successful network is, the more use-cases will safecoin have and the more will the second category importance grow. It is possible that in the future ratio will change to 1:99 in favor to second category.