i mostly have my BTC on paper wallets in a safe, but i do keep a small amount in breadwallet just for showing people and send small amounts. I think for long term storage paper wallets or offline hardware wallets are the way to go, the difference being paper wallets are free, which i like 
I actually store it at my apllication wallet in shic i can store manu of my bitcoin and then i can actually convert bitcoin to fiat in which i can withdraw it and buy things that i want.