Thanks @Timcliff and @davidpakman! It was very informative, especially the SBD fundamentals part!

You mentioned practically all people buy SBD tokens for speculative reasons but I would like to point out that many Steemians use Booster services that are paid in SBD. I have no idea about the total size of this demand but as I check out the wallets of these booster services I feel it's around 1-10k SBD per day they receive. (depending in size of booster service and only taking the few big ones into account.