It's not bad, but the profit has come from the rising BTC/$ rate not from the Jupiter. Any hardware needs to be valued in the number of BTC it cost and the number it gives you back.
Exactly
And this is why Rampion is wrong, because he is saying it is bad.
No, it is not bad, just worse than buying BTC and keeping them.
He's only saying that the investment in the miner was bad. Not the investment in BTC.