I somehow do like the masternode coins because they do promise a passive income but I always keep thinking what happens when all the coins are mined and the max supply has been met. Where do the rewards come from? I think it is making a lot of people hold the coins versus selling or dumping them for low prices but when the max supply has been reached isn't there going to be a huge dump of coins because there are no more rewards? If the coin price is high I am kind of sure people are just going to dump all their coins from masternodes and move on to the next where they still get rewards. Sure maybe a couple people will keep the masternode running but how good really is the blockchain secured if most people sell off their masternode coins?

I know it is going to be years until max supplies are going to be met but I just keep thinking about this. What is your opinion about it and do you invest in masternode coins?