It is always recommended that wallets be encrypted with a strong password to ensure the safety and security of your coins. While many wallet apps contain built-in security mechanisms, computers or phones that are compromised with malware can potentially leak your password. Hackers are constantly looking for sophisticated techniques to compromise machines to gain access to Bitcoin, so anti-malware should always be in place. Additionally, phishing attacks from fake emails are common and should be guarded against. Some recommended wallets and comparisons are listed below.