It is because coingeko uses the CEX apis and Upbit is the only one that has HBD listed. There they manipulate the price for them and it only serves to confuse.
Someone at Hive should develop a dapp that shows the price of HBD from the domestic market, they can even average between the different swaps. However they go the easy way of connecting to the coingeko API even if it is wrong.
Imagine if inside Hive this bug exists, how an external investor could discover it. On the contrary, they would think that HBD is less stable than it is, since in Upbit the price is more volatile.
And of course, to ask coingeko to show the real price, you first have to offer the tool that gives it.
Wow so that's why it's stuck with it.. I remember now-dead Bittrex was a bit special and very handy for me with that it was one of the very few exchanges at the time that also listed HBD. I see how easily Upbit can seem to be the single 'source of truth' simply since HBD now listed by none, or almost none.
Thanks!