MasterNodes are very useful for Cryptocurrency Investors as running a MasterNode provides them a lot of Incentives. It is just like earning a monthly or weekly interest on your Cryptocurrency Holdings.
Although different cryptocurrencies have different incentive models the ROI varies not to drastically. You can also call this as another of your Passive Income.
If you are invested in a Cryptocurrency that allows you to run a MasterNode, you should definitely explore that option of earning as it will serve as another Medium of Income for you.
Another thing to understand here is that you should choose the right currency for investment if you are solely investing in running a MasterNode. What I mean by this is that you should Calculate your ROI and Invest smartly.
There are numerous cryptos out there in the market that allow you to run a MasterNode but not all of them are worth it because they provide only a Meager cut of Incentive so you should look for better Options.