Optimism produces its own wallet computer software that may be available for down load on its website, which allows you to store Optimism in your Laptop. For optimum stability, you can store your cryptocurrencies with a focused hardware wallet for instance a TREZOR wallet or a Ledger Nano X. https://financefeeds.com/xrp-hits-100-billion-market-cap-claims-third-spot-in-copyright-rankings/