Ethereum's resurgence against Bitcoin in May has captured attention, reversing a trend of underperformance. As ETHBTC climbs back from an April low, questions swirl around its potential to regain lost ground. The ETH surge over $2,000 has sparked significant speculative interest, and this trend appears exclusive to Ethereum, hinting at unique catalysts at play. Yet, with its rally's foundation on fragile grounds, the crucial test lies ahead. What will determine if Ethereum's rebound is robust enough to withstand impending market volatility?