I have a significant fraction of my net worth invested in TSLA and have done so since the IPO. I believe TSLA will become a $50 billion dollar company over the forthcoming decade as it rides 2 cost trends and global GDP growth. Elon Musk does too - his renumeration package has TSLA pegged at a possible ~ $43 billion ( http://seekingalpha.com/article/786711-a-43-billion-tesla-mu... ). I add to my position every month…
But you are aware that betting big on Tesla like this is a very big risk, right? It's got a potentially very big payoff (and probably an expected value above 1), but there is still uncertainty. Tesla stock is valued a lot higher than the company's assets, so there is still big potential for a major loss, for instance if the established car companies are able to get their act together in time or if some other, unexpected event happens.
I myself have about 15% of my (relatively small) net worth in Tesla, so I am making the same bet you are, but I am curious if you've given the other scenario any thought.