Optimism makes its own wallet application that is available for down load on its website, which lets you store Optimism on the Pc. For optimum protection, you could store your cryptocurrencies on a focused hardware wallet for instance a TREZOR wallet or a Ledger Nano X. From the Bahamas, https://financefeeds.com/wall-street-pepe-rockets-toward-30m-is-this-the-next-big-meme-coin/