Besides root causes from your project that don't catch attention of the others, there is another cause, bump score. It reduces bump effects on some boards (4 boards for now). The others might not see your topics at the top of boards immediately after you bump it. I see you bump your threads almost everyday.
For bump score effects and 4-target boards, please see:
Bumping changes on some boardsVisually, the effects are like this
How to bring people and real crypto enthusiasts to altcoin anouncement thread at bitcointalk , without any bounty or spam shi-t ?
The answer is quite simple: you can't!
I want bring users and build discussion about our project, but I dont know how....

Everytime when I post something new about project any update there is no more reply...
That's because thousands of others want the exact same thing: attention for their made-up coin/token that's going to
disrupt the world and make
everyone the creators very rich. Without knowing your "project", I can already by 99.9% sure it not interesting.