The old bonds product you linked is no longer available - I don't want to confuse people.
If I understand correctly, you want to do the same thing as with BTC-EQTY but pay out a flat interest.
What is your rescue plan in case your holdings dramatically loose value? How are you going to repay creditors?
Yes, do you have enough LIQUID BTC assets to repay bondholders in the case of massive loss?
Remember, this is the era of TF and Ukyo becoming insolvent. There isn't much trust to go around.