I think all these Bloggers make mistakes at any point in time.
but it better to follow them to some extent if you think cannot do your own research better than them.
but i will also advice you to remember the rule of thumb: invest what you can afford to loose.
And it's much more important to decide where to invest. Investment is not a gamble and user should be cautions about the platform they are investing on and the probable profit or loss. All of this can mostly be achieved spending a few hours researching about the people, claims and project.