I totally agree with you on that we should spend money on saving our perfectly fine and gorgeous planet instead of chasing useless dreams.
But I’ve seen a video of Kurzgesagt explaining how “easy” it would be to terraform Venus compared to Mars. And since then I’ve been a defender of the idea that we should focus on Venus rather than Mars.
Terrifying Fact: before Venus became the Hell it is today it was exactly like Earth. But at some point its average temperature reached 23°C. Water vapor being a greenhouse gas and a fantastic heat capacitor, it transformed the planet into a pressure cooker, leading to its current state
The average temperature of planet Earth is 13°C, but with all the CO2 in the atmosphere we don’t know when that critical temperature could be reached.
But hey, billionaires gotta get their billions, right?