Bitcoin is economically set up such that its energy consumption will follow its price. With the price at the level it is now, the energy consumption is that of a medium-sized country.
An entire country's worth of energy is getting burned to run a network capable of a whooping TWO transactions a second.
Now that Tesla has bought these coins, they have so far driven the price up by another 10%. This will eventually be matched by an increase in carbon emissions of 10% of a medium-sized country.
This will most likely completely obliterate all of the carbon reductions that Tesla has managed to achieve so far.
Bitcoin, as it exists today, is a massive ongoing ecological disaster and probably a crime against humanity. And Tesla is now making it worse.