Elon Musk has built Tesla into a company worth around $1.5 trillion (£1.1 trillion), a valuation so large that it exceeds the combined worth of the next 10 most valuable carmakers on the planet. Tesla passed the $1 trillion mark in 2021 and, after a turbulent 2025, now sits far beyond it, even though it sells a fraction of the cars its rivals do. The gap is stark. Toyota, the world's biggest carmaker by sales, is valued at roughly $225B (£168B),…