Take the money and run

In the case of climate change and being a profit seeking business, I'd assume attempt to identify things whose demand will increase, like land in the areas predicted to remain most comfortable to live, farmland in areas least likely to lose productivity, companies that produce things like water desalination infrastructure, etc, and buy those things early before they become more expensive.

Buy up primary resources that are unlikely to devalue from climate change (such as indoor farming, solar panel factories, and housing in walkable areas that are less vulnerable to climate disaster like Dublin).

Buy up the tools by which the powerful will desperately cling to power (such as the military industrial complex, media/propaganda channels, and privatized human rights like health care).

Bribe politicians, fund authoritarian-capitalist propaganda, and organize coups to put fragile dictatorships in charge of valuable strategic/industrial resources (like lithium, rare earths, fossil fuel, uranium, etc.).

It is the stock brokerage division of banks giving their boiler room reps a “hot tip” lead.

"When it gets hot, people will use more air conditioning." Thanks Morgan Stanley, that's some real insider knowledge.

There’re many sources of greenhouse gas emissions however it is clear that electricity, transportation and industrial processes are the big ones. Agriculture is in there but is nowhere near electricity. So electrify everything is the best bang rather than large social engineering projects.