John Quiggin - Bitcoin now a much bigger waste of energy. It's now taking several gigawatts of energy just to mine Bitcoin, more than the energy draw of most countries.
But also, John says other fun things:
Despite the huge increase in the market value of bitcoins, they seem further than ever from becoming an actual currency. Unsurprisingly, there’s no sign that governments are willing to accept bitcoins as legal tender. Nor is there any sign that they are displacing standard forms of money. On the contrary, bitcoins now seem to be seen as a financial asset, with no real suggestion that they will ever be a general medium of exchange.
As a check on this, here’s a list of firms that accept bitcoin as payment, which fits easily on to a single page. Sydney readers who would like to buy a beer with bitcoin are in luck, or were back in 2014 when the Old Fitzroy got a bit of coverage for saying it would accept bitcoins. There’s another pub listed in London, and that’s about it as far as drinks are concerned. After nearly a decade, Bitcoin acceptance remains the stuff of publicity stunts, not a serious commercial option.
At least by repute, bitcoins are used more extensively in covert transactions such as those involving drug trading, tax evasion and money laundering. But that’s scarcely a good reason to bet on them being around for a long while. If the scale of the problem gets large enough to cause real problems, governments will act to shut the whole system down or regulate it to the point where the compliance costs make the whole idea unattractive.
Keep buying bitcoin!