Modern financial markets are Ponzi schemes, and they are much larger than bitcoin.
How did you decide to compare the risk of nuclear holocaust to global warming? Anecdotally, I'd rather see temperatures rise over time and have a chance to adjust for it rather than die in a nuclear blast or issues immediately after.
People really have trouble understanding run-off events. You do realize that global temperature increase will not be linear? A slight increase in temperature melts ice that previously trapped plenty of CO2, which will increase the green house effect, increasing temperatures, and here is your feed back loop.
