Chime Financial Inc. is studying how to add stablecoins to its consumer banking platform, underscoring how the asset class is expanding from crypto trading into everyday payment use. The San Francisco-based fintech asked blockchain technology companies in late spring to submit proposals for "end-to-end" stablecoin wallet services, according to people familiar with the plans and a document seen by Bloomberg News. It remains unclear which technology provider Chime will choose, or what specific stablecoin products and features it may ultimately offer.