investment means holding the coin for a medium to long period
You are fooling yourself. If you hold this coin medium to long term, you will simply lose all your money.
Marksteven has not done anything on github in the last 10 days. There is an open issue, nobody did anything about it, neither he nor the other phantom developer. There is a pull request waiting (since two weeks) to be reviewed and merged, no work done on that.
It's simple as that: Marksteven does not have the skills to get a working crypto coin out the door and instead of trying, he is goofing around on discord and selling off his bags once the price goes up.
If you bought in at a higher price (like I did, unfortunately), you can kiss your money good-bye.