Q1: Yes the company will be here, whether Petrozene is a winner or not. Posting past failures on message boards have little to no effect on whether this stock trades or not.
Q2: I don't know if "good" is the right word. Most people who trade base their decisions on experience. Buying, selling, or deciding to hold just because someone says you should can be unhealthy to your portfolio.
Q3: All the info you have is readily available to all investors. Just gotta know where to look.
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