However, it is unlikely that I would have taken those coins and done that. he others may have. But we do have 4000 coins sitting idle earning no interest, so that is a cost (even if just an opportunity cost).
PatrickHarnett, I don't understand why it's unlikely that you would have taken those coins and invested with Pirate directly. For this round of PPT.A, your downside is
exactly the same as if you deposited 846 btc with pirate and did compounding interest for 4 weeks. If pirate defaults, you lose 846 btc in both scenarios. But your upside is less with selling 3000 shares of PPT.A at 1.038. So no matter how you look at it, this round of PPT.A is strictly worse than just deposing most of the insurance fund with pirate.
If you don't agree with my analysis, then I'm willing to personally buy 3000 more shares of PPT.A at 1.038 from you. As long as you promise to give me 960 btc if pirate defaults.
You are effectively giving people a 33.7% interest rate, which is better than pirates 31% compounding rate.
I do not agree with your analysis.
For a start, I have other demands on funds that have longer term uses other than BS&T. I reached a point with my deposit some time ago (around 1 March) where I considered 4000 was a sufficient exposure to a single point of failure.
Second, I have a portfolio to manage. If you were investing and choose to put 100% into one asset, that is simply poor risk management and you need to consider expected returns.
Third, I have several strategies in play, and one is maintaining an overall level of funds in BTC. Lately I have been retaining additional coins to meet business needs (such as long term finance and other asset purchases), and checking my position I am currently 2715.78 BTC above my preferred position and partly because I extended a loan to a good friend rather than converting into funds for some of my other hobbies.
What you also fail to include in the strict math sense, is the fun aspect. It's more interesting to me to be doing some other stuff. Quite why I would accept 1.038 for more bonds, I am not sure, but if you wish to forward 3114BTC to me and have me pay you 3840BTC in four weeks time having put them into my BS&T account, then feel free to do so (but I have no particular reason to offer 960 coins in the event of a Pirate default) so as you have a deposit address, after all many people have coins with me getting a mere 1.5%/week and they are quite happy with the arrangement.