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?
There are substantial BTC cash reserves (unexposed to any risk) leveraged at 25:30 ratio (almost 1:1) at full bond subscription. There is also a limit on bonds, meaning that this ratio disparity cannot exceed that.
In other words, we have cash reserves alone almost equalling the total bond issuance. That's not even including our other assets, which are several times greater. Future bonds won't have such good leverage, but I'm playing it safe to start.