Optimism generates its have wallet software that is certainly obtainable for download on its website, which allows you to store Optimism with your Laptop or computer. For max security, you can store your cryptocurrencies with a dedicated hardware wallet such as a TREZOR wallet or even a Ledger Nano https://financefeeds.com/pepe-unchained-vs-blockdag-which-presale-project-should-holders-bet-their-dollars-on/