(Reuters) -Coinbase's first-mover advantage as the only publicly traded crypto exchange helped it top earnings estimates again, but competition is looming from clearer rules and newly listed companies, Wall Street analysts said on Friday. The global crypto market has swelled to $3.7 trillion as institutional and retail investors pour money into digital assets. President Donald Trump has eased regulatory hurdles in the United States after taking office in January, driving bitcoin to record highs and paving the way for the industry's biggest players to tap public markets.