OpenTrade has raised $17 million in a round led by Mercury Fund and Notion Capital, bringing its total funding to over $30 million.The stablecoin platform said it processed more than $250 million in transaction volume in 2025 and is on pace to surpass $1 billion by the end of 2026 as it expands its permissionless infrastructure for fintechs, neobanks, and asset issuers.