Electric cars will only be a means of transport with lower emissions than cars running on fossil fuels.
We cannot compare Bitcoin and electric cars because it belongs to two different application areas.
If comparing Bitcoin with altcoins with other mining mechanisms like POS or hard drive mining like CHIA, CONFLUX, BURST, it will be fairer.
I think Elon Musk is right about Bitcoin. But unfortunately, he is not a legislator so we need to listen to the government instead of Elon Musk.
Bitcoin is a currency that is mined by computer equipment, mining uses electrical energy and emits carbon emissions. Such a currency is not really good because it consumes too much energy.
What Elon is referring to is that there is something other than Bitcoin that consumes less energy and emits less carbon. Soon, Elon continued to talk about Bitcoin using renewable electricity like solar or wind power. It was a flip of the argument he had stated before.
I have no opinion about electric cars because it is certainly less environmentally harmful than cars running on fossil fuels.