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I wouldn't recommend keeping XRP at all, but there are many options.
The safest is obviously a paper wallet: http://ripplepaperwallet.com
If you don't like paper wallets, you can find other options here: https://www.xrpchat.com/topic/4063-popular-wallets/

You have given me good info.. Again can you tell me why not to keep xrp..Is it not a good investment