wish these coins would stay profitable for more than a day

Just shows you how many miners are out there. Vanilla was great for about half a day, then people hopped off of other big coins or ones with private miners (like x11) and wrecked it, then they went back to their more profitable private miners.
if people weren't dumping like crazy right after mining, it would profitable longer...
hence stop dumping... have some vtc, it went several time from not profitable to very profitable, if you are patient enough
you can get an interesting deal... that the way altcoins work, but since a year it is the "dump directly on exchange" which seems to prevail hence the low profit... well sorry but this is a bit on you... (please spare me the "I have electricity bill to pay..." which isn't a good excuse...
It's not profitable UNLESS you exchange them for BTC. Otherwise you're just a bag holder. Artificial coin pricing based on people not selling coins is not a market you want to be in (happened with Burst). That means when people sell, the whole market will collapse. The coin will equalize at whatever the daily mine rate is for the coin, minus buy support. Which is usually about the same for all coins as the market and mining profitability equalizes.
The only people the coin would stay profitable for if people held coins are the people actually selling. It's a good way to screw over your fellow miners.
I have electricity to pay for is a great excuse. Miners don't mine to be bag holders. They aren't investors, that's a completely different job title. Investors buy the coin and hold it for value to increase.
and why "investors" would buy a coin which gets dumped on a daily basis, by miners ? I mean you realize there is no point in investing in something which loses value on a daily basis, because people like you aren't able to hold a little.
To keep a profitable offer, you can't have infinite supply... that's seems pretty logical to me.
You completely miss the point actually... and that's the reason why many coins went to POS, to avoid moronic miners like you... and quite frankly you are the one getting hurt in the process... because investors stop investing and you are the losing money in electricity... anyway, this is basic economy...