Value of Steem goes up and down, and I trade a lot on the market place, so some days I have alot of steem, some days a lot of Sp..

No idea, really, comes from my head.. I have an idea and I write about it.. some ideas have worked out, some have not.. most important is to engage your followers and communicate with them and respond to their comments.
3.Read the parent article which is the link in the spinning gif and that may answer your question.