Be very careful of this. I have two 1,000 coin masternodes. Now they are changing the collateral every so many blocks. Sounds like being forced to buy more coins. Sounds like a dev pump and dump but I could be wrong. Just a gut feeling.
I also have 2 mns but i will not buy any more coins i will keep saving from staking.
The dev, based on my interactions with him, seems like a stand up dude or dudette. I have several MNs and ASICs helping to support the network. And like you not investing more, only increasing my position by trading 1/2 of my daily MN earnings, 1/4 goes to saving up for next collateral jump, and 1/4 goes to folk in the community who are helping out like Bit Yoda who has been assisting with guides and providing a sense of stability in helping MN owners get organized. He's a beast! This coin really needs a community voice or some investor relation-type person. My 2 cents.