According to Lex Sokolin (@LexSokolin), leading fintech companies like Coinbase, Stripe, Robinhood, and Revolut began by mastering a single core service—Coinbase with Bitcoin buying, Stripe with payment processing, Robinhood with free stock trades, and Revolut with FX transfers—before rapidly expanding their offerings and market reach. This focused approach enabled each platform to capture significant user bases and scale into multi-product empires. For traders and investors, this highlights the importance of monitoring companies with a clear niche in crypto or fintech, as their initial traction can signal future expansion and greater market impact, influencing both cryptocurrency and stock market dynamics (Source: Lex Sokolin, Twitter, May 30, 2025).