Trusted masternodes like Dash require sufficient amount of money and have quite low ROI of 5-10% annually. That would be same if you bought some good stocks.
Masternodes with very high ROI like 1500% are very unstable. Their percentage is changing frequently and only downwards. Also their price is declining very quickly.
I strongly recommend you to search and read a lot about the currency and its team you are going to invest in.