I'm genuinely asking this question, NOT trying to offend anyone.

- Are the people who are posting their insights in the topic about leverage, and "how/when/how large", have a winning track record in trading with a large sample size of more than five years?

Because if you don't, and if you're a mere pleb like many of us in BitcoinTalk, it's probably better not to post from a position of authority, but post from a position of inquisitiveness and learning.