Any offline wallet that let you have full control over your private keys.
I suggest you to use
Electrum. It's simple, lightweight and safe.
Don't (ever) store your coins in a web wallet or exchange like Coinbase, Poloniex, etc...
This is a question that has also been on my mind too ever since ths discussion has gotten to a head to the point of a thread created by the Admin that even after several months of being involved in bitcoin, I have only used online wallets which I believe right now is not the right place to keep coins at this time. Hopefully, the worst won't happen in August 1 so everything can be back to normal within a short period of time.