Oooh that's a tough one, despite the 10 years guaranteed to debase in purchasing power terms, you still have the coupon payments and the possibility to trade it within that time if you know what you're doing.

While the miner carries risk too, there's the competitiveness of the device over 10 year period, which will probably become obsolete in terms of premium returns ever 5 years, then there's the risk of compass failing, or governments shutting them down

So to me, the miner is the riskier bet, but I would still go for it. If it's just holding though, for 10 years, versus the miner running for even 5, id' still go for the miner

My reasoning is that the bond payments are in cash, which i probably would now hold or try to reinvest, while the miner pays out in satoshis, even if the miner is canned earlier, I still have custody of the satoshis in a private key held wallet and the longer the miner can run, me taking that risk, the more sats I have.

So i'd opt to run it till its shut down in one way or another, if it makes the 10 years great, if not I still have the sats that I can now hold and still get purchasing power appreciation