How do I act on Steem today!!

Well my wallet is not hugh, but slowly rising. I regret that i did not act like the way I act on my stock investments. Selling out SBD with i high value (4$) and buying again at the value today. But this I see as a lesson to remember on the next rise. Today I have saved up about 280SBd without powering up. I will most likely do this when the price of Steem is closer to 1. Will I do this with all the SBD. Hum, I guess it would be smart to maybe hold back some of it to do some smart trading, beat the market by selling on a high price and then buying back at a lower price. Is this smart? Well if you time it and pay enough attention you will or should be able to get some nice returns. If you earn 20% or more on some button pushing it would be worth it would it not?
I see that many of those I follow buy Steem for SBD on this high prices, I really don't understand why. I have been a member since December and this cost price has normally been around 1. Why do some then buy at 0.5???

To compare with a daily spending...

In Norway we have fuel prices changing daily. Where i live the normal price is about 1.8$ pr liter diesel. But every Tuesday the price drops to about 1.55$ So when do you fill up your tank? I do on Tuesdays... This is also the way I think for buying STEEM with SBD.
Have a great evening
Best regards @EveryDayCoach