Much like Microsoft and Cisco dominated the internet boom of the late 1990s, Bitcoin has long ruled as the king of the cryptocurrency realm. In the shadows, however, sits another noble -- Ethereum (ETH -0.55%) -- with the potential to challenge Bitcoin's crown. Tom Lee of Fundstrat has been pounding the table on Ethereum, calling for significant upside despite its lagging performance relative to Bitcoin. Let's examine the fundamental differences between these two crypto titans and explore the catalysts that could position Ethereum for a long-term ascent.At its core, Bitcoin is best thought of as a digital commodity. ... (full story)