How do bitcoin Maximalists argue against cryptocurrencies?

As a keen observer of the cryptocurrency landscape, I'm curious to understand how Bitcoin Maximalists justify their position against other digital currencies. Could you elaborate on their key arguments? Do they claim that Bitcoin is inherently superior due to its limited supply, decentralized nature, or security features? Or do they argue that other cryptocurrencies lack the same level of trust and stability, hence making Bitcoin the only viable option? Additionally, how do they respond to criticisms that Bitcoin's scalability and transaction speeds lag behind other cryptos? I'm eager to gain a deeper understanding of their perspective and the rationale behind their staunch support for Bitcoin.