Optimism generates its own wallet software that is certainly obtainable for down load on its website, which allows you to store Optimism on your own Laptop. For max stability, you can store your cryptocurrencies on the focused hardware wallet like a TREZOR wallet or simply a Ledger Nano X. https://financefeeds.com/top-cryptocurrencies-to-buy-now-5-best-coins-with-1000x-growth-potential/