Thoughts on this comment by Elon Musk on Lithium supply?, page-4

We firstly need to address the fact that Tesla will be one of many EV makers and battery storage solutions in the future, so demand will increase dramatically.

Secondly, if you are late to market like some of these speculative miners will you could be facing a lot of downward pressure on profit margins that may make operations unprofitable.

Third and foremost is the real deficit in supply that is currently escalating the price of Lithium, no matter the percentage of the battery's composition it represents.

They are also probably playing it down because they don't want to pay top dollar for it, after all, they actually require 8.5 kilograms per car