The 300 trillion coin premine for the dev is the biggest I ever heard of. I think it's too much and worry he might dump if it goes on an exchange.
The thing is 0.3% is not a lot, its just a number.
For example if the coin had a maximum of 1000 coin supply and I had 3 of those, that still makes 0.3%.
As for dumping, it won't really matter if anyone dumps the coin since the price I'm expecting it to be on average is 0.00000001 BTC. BTC can't go lower than this price so that point is moot my friend.

With the amount of coins (4 billion CRT) in each block, the coin will generate a lot of profit for miners and traders.

it never stays at 1 satoshi...you're crazy if you think that..