TON: Telegram's Crypto Solution
Telegram needed a payment solution and Toncoin is it. They went out and developed their own crypto solution, tightly integrated it in to Telegram, and then opened it up for anyone to use. It's literally called TON for "The Open Network".
You may not be AWARE, or maybe YOU ARE, that Telegram has grown to be more than just a direct-message chat app. People sell DIGITAL GOODS, conduct in-person purchase and sales transactions and even run professional group chats that you must pay to enter. All of these use-cases benefit from a native payment system, and now Telegram has it.
It's no surprise that with the popularity of Telegram, Toncoin is off to a great start.