Hey, sorry to hear about the predicament, when business collides with insane regulations, it's a very frustrating thing to be caught in.

number 2, btc mining environmental impact, I generally disagree,but I can understand the argument, however ...

number 1, the crypto exposure aspect

   a) what prevents your from selling the BTC the moment you mine them to pay for OPEX, and then invest what is leftover in tradfi?

   b) While many on this site will violently and deeply disagree in spite of being proven wrong over and over and over again (the definition of insanity, etc...), I'd argue that being "over-exposed to BTC" over the last 15 years has not exactly been a bad thing if you can stomach the volatility.

And I'm very sorry to hear S'pore wasn't good to you, this is one of my very favourite place on Earth (in particular the food).

It's good that you repented and at least tried to do something good with the money, but it would have been even better to donate it to an environmental organization with better judgement than you have. Proof of work crypto mining was an inexcusably bad idea for humanity from day one.

As for (2), there are so many other ways to exploit that electricity. Mining Bitcoin isn’t the only way. But I agree, you should have considered batteries, and more flexible loads into your calculations as to how to be profitable. 3MWh is considerable for many usecases.