Thank you for your informative answer.My comments are :-
The coin supply is reasonable ,although there are quite a number of MN coins with much lower current and total supply.
I like the idea of varying rewards along with the stated user case.But,I'm afraid people will still dump during the very high ROI periods UNLESS you can persuade them to keep them " locked " in your free pool...now thats a very good idea, not the first in its field ,but rare nonetheless.It may work,I hope so.If not ,you will need other incentives.
BUT,the answer to maintaining/increasing  a coins value is all about the User Case.I need to know more about your ,what appears to be ,some sort of Retirement Plan.I'm from England so this is not something I'm aware of.
Having said all the above ,I like what I see ,and the Discord channel is a very friendly place.I would urge you however to supply weekly updates and, in the new World of disclosure ,give all information about the owners /developers.This will very soon become the norm end not before time.
Many Thanks
David Webb