However, the real ROI will change dramatically due to total active HELDcoin masternode in the network; and its real price at specific point of time.
https://masternodes.online/currencies/HLDC/
In addition, the total trading volume of the coin during the last 24 hours are almost zero, which is not a good signals for its investors because they will probably hard to sell their coins immediately when they want to get their money back.
Those investors you mentioned should be patient of its current price due to the potential in long-term. And there are still a lot of decent signals more than the 24 hours trading volume which is almost concerned by only traders.