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? 
I am interested on running masternodes but what prevents me from doing so is requirement of it running 24/7. It is hard for some people to do that is why it may take some time for all the coins to be mined. Masternodes is a good thing i think for some in the sense that it would give a good passive income.