Buying Bitcoin and driving the price up 10% is the same as if @Tesla had put 800,000 gasoline-powered cars back on the road, forever. The math:
Bitcoin's carbon footprint is 37 Megatons / year CO2 (about the same as New Zealand). This is electricity used by computers that participate in a gambling contest to win new bitcoins.
If you increase their winnings, gamblers will add new machines to match the change (if electricity stays at the same cost).
Adding 10% to the price will add 3.7 Megatons / year CO2. A passenger car creates about 4.6 tons / year. So 3.7 million divided by 4.6 = 804,300 cars.