Originally Posted by
watercooled
You miss another vital aspect of a currency in stability i.e. the total opposite of the huge volatility seen in cryptocurrencies. That, combined with the transaction fees, transaction times, limited transaction processing capability on the network, amongst other reasons, write it off as a serious currency. Plus any actual transactions are realistically compared to existing currencies, be it USD or GBP or EUR. You can't ask someone to pay 0.001BTC for a product and expect to leave it there for months, because that could mean losing money in a month, a week, or perhaps even tomorrow. On the other hand, that same value could be worth more so no-one will pay that price. Once you start asking for "the equivalent of $10 in BTC" it's not an independent currency at all and does not "break free from 'the system'".
A useful currency needs to succeed on all of the aspects. Failing on any one of them means it fails overall.
The likes of BTC or ETH in its current form aren't nearly as open/free/independent as they're made out. Some entities hold considerable power over the network, and the network is currently stacked in favour of profit-making for miners at the expense of usability as a currency.
I'm open minded and in fact interested to see where ETH ends up after 2.0, however there is a lot more work besides transaction processing for it to offer any real advantages as a currency. It absolutely *needs* to be more stable, transactions need to be fast and cheap, as a bare minimum. And on top of that, pro-crypto individuals seem to ignore the real, tangible benefits of conventional banking such as fraud and theft protection, a way to access your life savings should you forget your password, and so on. Plus important regulatory matters like money laundering, tracing of illicit payments for crime prevention, tax evasion, and so on. Yes, I recognise some people see all of that as unnecessary, and that we shouldn't have to pay tax, and the police should be defunded, etc. All equally silly.
ETH 2.0 might form the framework for a workable payment processing system, but it needs a lot more work in front of that to make it a worthwhile alternative as a currency. The fact there are dubious 'stablecoins' tied to USD demonstrates a major fundamental problem with most cryptocurrencies.
The difference is, I'm sure you would choose an alternative method of travel if it was easily accessible and several orders of magnitude less harmful to the environment. In the case of currency, that alternative already exists.
Again, no-one is making the claim that PoW is single-handedly causing global warming, it's just a totally unnecessary waste of resources for dubious *real* benefit. That, and the fact it continues to grow pretty much as fast as processors can be manufactured, is deeply worrying.