BTC has been a scamcoin in the hands of banks for a long time now.

So... Why Bitcoin Cash?

There exists a website by that exact name but to cover some points not mentioned there and for a quick overview:

Bitcoin Cash is a decentralized peer-to-peer electronic cash system that does not rely on any central authority like a government or financial institutions like banks or for-profit companies like Blockstream. As such, it represents a fundamental redesign of the very nature of money. The core features of Bitcoin Cash are:

• Open to anyone. Nobody controls or owns Bitcoin Cash. There's no CEO, and you don't need to ask for permission to use it.
• Pseudonymous. Identities are not tied to transactions. This helps to ensure that Bitcoin Cash remains free to be used by anyone, without censorship.
• Transparent. All transactions are recorded on a global public ledger called the blockchain. The ledger is updated at regular intervals in blocks that are connected to form a chain. This allows anyone to easily see the full history of ownership, and helps to eliminate the potential for fraud.
• Distributed. The public ledger (blockchain) is stored voluntarily by a network of participants known as 'nodes.' This helps to ensure the longevity of information.
• Rules-based. Nodes follow a set of rules (a protocol) to achieve consensus on the state of the ledger. This consensus is what constitutes the 'truth' as to who owns what. The protocol, however, can evolve as participants demand - although there is high-degree of consensus required to make changes. This makes Bitcoin Cash a quasi-political system, with participants forming a kind of social contract.
• Immutable. The technology deployed means that, once recorded in the blockchain, transactions effectively cannot be altered.
• Secure. Through a process known as Proof of Work (PoW), 'miners' compete to add new blocks to the chain that constitutes the ledger (again, the blockchain). The hardware and energy costs associated with PoW mining contribute to the security of the network along game-theory driven principles such that attacking the network is both prohibitively expensive and guarantees the attacker cannot profit directly.
• Fixed supply. Only 21 million coins will ever be created. This makes Bitcoin Cash a hard asset, like land or gold, providing an opportunity for people to store value in digital realm over long periods of time.
• Low Fees. Bitcoin Cash enables reliable, fast, and affordable transactions of any value and regardless of location (including cross-border transactions). This makes it an effective alternative to payment networks like Visa and Mastercard.

Highly effective medium of exchange

Bitcoin Cash enables peer-to-peer payments between individuals - just like cash, but in the digital realm. Critically, fees for sending Bitcoin Cash typically amount to less than a penny per transaction, and settlement occurs near instantly, regardless of the physical location of participants. This makes Bitcoin Cash useful for not only remittances and cross-border trade, but also for daily transactions like buying groceries. Since the fees and transaction times are so low, Bitcoin Cash is also effective for micro-transaction use cases like tipping content creators and rewarding app users.

Economic freedom

Economic freedom is the ability for individuals to freely acquire and use personal resources however they choose, both independently and in cooperation with others. It is a vital component of human dignity and a fundamental human right. Money - as a vehicle that can be used for both storing and exchanging value - is a central tool for enabling economic freedom.

Bitcoin Cash provides, on an opt-in basis, an alternative form of money that supports economic freedom. Unlike national currencies, Bitcoin Cash integrates strong protection against (1) monetary confiscation, (2) censorship, and (3) devaluation through uncapped inflation.