I am new to Ripple coin(XRP) , as one of my friend told me that XRP is good for long term investment.
I cannot say it is a good long term investment when it still has a pending case with the SEC. Are you aware of that?
I wanted to buy it but i dont know which wallet is good to store and keep safe. I dont want to store it in multi coin wallet as they are not secure.
Maybe you mean you don't want to use mobile apps? Hardware wallet like Ledger Nano X supports many cryptocurrencies including XRP but it is considered one of the most secure wallets. You should avoid web wallets too if your plan is to store crypto for long term.