To prevent dump the coin maybe it should be better to accept masternodes? People who have 1000s of IRD will cooperate to get masternodes and wont dump their coins.
Or are there any other options to prevent people from dump?
Why in the world would masternodes prevent dumping? They aren't helping SnowGem or CheeseCoin, for two random examples.
The best thing that prevents dumping is an appreciating price, and price is more likely to go up if: 1) the devs are active; 2) the coin has an interesting use case or solves a unique problem; 3) the coin is marketed/promoted more than just the occasional post in the ANN thread; 4) the crypto market as a whole is going up.
Oh, and one other thing - there can't even be a whiff of scamminess about the coin.
I'll leave it up to the individual miner/investor to determine whether IRD meets any of the above criteria.