Morgan Stanley raised its bull case for Tesla from $600 to $800 a share — more than double what the stock is trading at now. Such a price would give the electric-car company, which in this vision would mostly be a ride-sharing company, a market cap of about $2.6 trillion.

Of course, like all analyst estimates, this is really just a wild guess. It’s one that would require Tesla to grow its ride-sharing fleet to 12 million vehicles in 15 years, up from — er — zero now. It would also require huge jumps in Tesla’s recurring revenue from things like full self-driving and supercharger fees.