I want to make a quality post what should it has abilities?
1. Should I choose a one topic like current affairs or only bitcoin or only altcoins discussion or should I post everything here.
2. Should the post has old information?
3. Should I post only links which define my whole post.?
1. You should post on topics and boards that genuinely interest you, and this forum has a huge variety of boards to choose from. Don't force yourself to write about something you don't care about, that's how shiposts are made.
2. Before creating a new topic, use the forum's search function to check if it was created before. We really don't need a thread about quantum computers every week.
3. If your opening post is nothing more than a link, it's just a spam. You should write a short summary of your link, maybe add some excerpt from your link, and only then put the link in the end.
Overall, it sounds like you are asking how to write "quality posts" to earn merit, and that's already a wrong approach, because merit is not some social ladder to be climbed. Just use this forum like you'd use any other forum, and first and foremost, follow its rules.