RE: Help needed: why some of my posts increase and decrease $$ value?

if you buy Steem (and use it too power up) , then the Voting power of your account will increase.

Your voting power is expressed as 'SP'.
Which is currently 32 for you.
You can check your voting power on https://steemd.com/@fra4891.

According to my best knowledge, your up-vote becomes worth a penny when the SP is around 70.

For every SP, one Steem is needed. This means that you need to buy around 40 Steem. In order for you to reach that penny level.

So what i'm trying to say is: you aren't going to get rich by upvoting yourself..

Then their are two ways left to make money with Steem:

Buy Steem, and hoping for the price to increase. Selling them with a profit. But Risky.

Write posts and comments, and earn from other peoples up-votes.

I'm not a expert on stock markets and investing. Though I learn a lot from @cryptopassion . So if your are serious about investing, you might want to read some of his blogs.