Can the trading platform become one of the largest financial ecosystems?Robinhood (HOOD 4.63%) has been one of the hottest stocks on the market recently. It's up almost 500% during the past year, and it keeps climbing.The fintech superstar is a lot more than meme trades today. It serves a large and growing consumer base with an increasing array of services, and it has a lot more up its sleeve. But can it keep this up during the next three years? Let's see what might be happening at Robinhood in 2028.Champio ...