It has been a long time since I last debated this stuff, so it is funny to see the same talking points from 10 years ago.
1) PoW is the only way that is actually decentralized. If you want decentralized power over the currency - PoS will never work on a long time horizon, because you'd need some way of representing stake that is just impossible. As far as the whole "waste" complaint: relative to what? I've never seen a comparative study that included the entirety of the existing financial system. The academic papers I have seen complaining about bitcoin were full of comically bad errors: using geolocation to try and pin mining operations to nearest power plants, estimating hashes per watt based on FPGA or first gen ASIC miners, etc.
2) Bitcoin volatility has been going down every year, which makes sense given wider participation. Volatility is obviously different from price.
3) Bitcoin has had the capability for offchain transactions a long time now - using smart contracts with onchain settlement, so this really isn't a real concern any longer.
1) PoW is the only way that is actually decentralized. If you want decentralized power over the currency - PoS will never work on a long time horizon, because you'd need some way of representing stake that is just impossible. As far as the whole "waste" complaint: relative to what? I've never seen a comparative study that included the entirety of the existing financial system. The academic papers I have seen complaining about bitcoin were full of comically bad errors: using geolocation to try and pin mining operations to nearest power plants, estimating hashes per watt based on FPGA or first gen ASIC miners, etc.
2) Bitcoin volatility has been going down every year, which makes sense given wider participation. Volatility is obviously different from price.
3) Bitcoin has had the capability for offchain transactions a long time now - using smart contracts with onchain settlement, so this really isn't a real concern any longer.