The big deal is that Cashapp is way more than just a payment service - it's like, a whole ecosystem. You can use it to buy and sell Bitcoin, invest in stocks, and even get a debit card that's linked to your account.
And, fun fact: Cashapp was created by Twitter co-founder Jack Dorsey, which is pretty cool. He wanted to make it easy for people to send and receive money, without having to deal with all the hassle of traditional banking.