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 
You don't think that's risky?
what if you have fire? (assuming your safe isnt fire proof)
I keep some on my phone, and most in coinbase.
What you told is correct keeping paper wallet in a safe is also risky but instead you can make a printed copy in some good options life coffee mug, any show piece so it will be safe.
and you told that you are holding in coinbase which is a web wallet which is also not good as you dont have private key of the coinbase wallet and if tomorrow any thing happen or coinbase close your account you can do nothing . So it is better to store it in desktop wallet like electrum which is very easy to use and very safe