JPMorgan Chase has upgraded Coinbase's stock rating from "neutral" to "overweight" and increased its target price from $342 to $404. Despite a 30% rise in Coinbase's stock this year, JPMorgan sees further growth potential, estimating a 25% upside. Analyst Kenneth Worthington highlighted the potential issuance of Base tokens by Coinbase as a significant catalyst for ecosystem expansion, with an expected market value between $12 billion and $34 billion. Additionally, Coinbase's monthly subscription services are viewed as another potential growth driver.