Which crypto is the most secure?

I understand that security is a major concern when it comes to investing in cryptocurrencies. So, I'd like to ask, which crypto is considered the most secure? Is there a specific cryptocurrency that has been proven to have robust security measures in place, both in terms of its blockchain technology and the security practices of its developers and exchanges? Additionally, are there any factors that investors should consider when evaluating the security of a cryptocurrency, such as its hashing algorithm, consensus mechanism, or level of decentralization?