Bitcoin security expert Andreas Antonopoulos said that most desktop operating systems are not secure enough, and that most desktops and laptops are not secure enough to store cryptocurrencies. According to Antonopoulos, the wallet that generates a secure mnemonic phrase on the user's device is a hardware wallet, which does not leave the device, and the best way to store funds is to use a hardware wallet. But hardware wallets are expensive. Therefore, he said that the second best option in this case is to download the wallet on a smartphone. He further stated that since the security of desktop wallets is much lower than the security of downloading from mobile phones, he suggested that users only use desktop wallets in conjunction with hardware wallets, that is, keys are generated and stored in hardware wallets, and Not on a general operating system.