Sort:  

So let's assume the Steem price decreases with 40% in the week following up after you bought your @smartsteem upvotes. What profit will I then make on buying upvotes via @smartsteem?

well 40% less in dollar value seems like a good answer

market fluctuations are not taken into account here. but in the end, gathering more SP is what is important, for the moment it is not all that important how much each sp is worth

But if you spend SBD on buying upvotes and in the following week the Steem price decreases significant, then you end up with less SP then when you just bought it with the SBD you now spend on buying upvotes. Correct?

depends on how much the change is but essentially correct and it also works the opposite way

Yeah it's basically a lottery. Although if you maximize your profit you have a very good chance of always profiting from it.

Another threat is that @steemcleaners or @berniesanders visits you for a downvote. Because of plagiarism or reward pool rapism. I saw that happening to.

Coin Marketplace

STEEM 0.15
TRX 0.16
JST 0.028
BTC 67814.21
ETH 2401.94
USDT 1.00
SBD 2.34