Optimism generates its have wallet application that may be readily available for obtain on its website, which allows you to store Optimism with your computer. For max security, you are able to store your cryptocurrencies on the dedicated hardware wallet such as a TREZOR wallet or simply a Ledger https://financefeeds.com/this-emerging-copyright-could-mirror-xrp-and-adas-success-outpacing-dogecoin-on-its-path-to-1/