> Can you point to the source? I've been a SpaceX fan for a long time and never heard him say that.

Source is from the 2016 International Astronautical Congress talk in Mexico [1]:

> And I should say also that the main reason I'm personally accumulating assets is in order to fund this. So I really don't have any other motivation for personally accumulating assets, except to be able to make the biggest contribution I can to making life multiplanetary

[1] http://shitelonsays.com/transcript/making-humans-a-multiplan...

Don’t remember the source, but I’ve heard Musk say this between the lines in an interview. I.e. something along the lines of «you need a lot of money to get humanity to Mars» on questions of Tesla’s long-term profitability.

The more cash crops you have, the merrier!