Other than the reasons already stated this coin is very unique and is creating a new system i bet gets copied soon with the dynamic rewards
It really is a brilliant concept in the way it is designed to work - in theory all current holders basically have a lottery ticket to get free coins by staking - this creates both opportunity for non miners as well to buy from market and get free coins by staking  -so even investors getting in now have a chance at the rewards from the remaining 600k - this creates the desire to stake  - all these things added up = less coins on exchanges which in turn makes the price easier to rise

win win BTC