The limit shown above is smaller than what we can provide in theory (the limit you're seeing is proportional to our inventory of HBD, not the restriction on how much trading can be done in a day, which is $20K per day for established users).

Our inventory of HBD is currently low (only around 9000 HBD), but not long ago we had well over 90K of accumulated HBD. But our inventory was building, so I decided to convert it to Hive while the Hive price was low, since there wasn't a huge demand of HBD at that time.

But to make a long story short, if we see a sufficiently increased demand for HBD, we can increase our inventory.