How to choose a crypto wallet for iPhone?

When it comes to selecting a crypto wallet for your iPhone, what factors should one consider? Are there specific security measures to look out for, or features that are essential for a seamless user experience? Additionally, how do I ensure that my wallet is compatible with the cryptocurrencies I intend to hold, and is there a way to backup my wallet in case of any unforeseen circumstances? Furthermore, is there a difference between hot and cold wallets, and which one is more suitable for storing larger amounts of cryptocurrency? Lastly, can you recommend any popular or reliable crypto wallets for iPhone that meet these criteria?