Simple i dont keep the keys on a machine i use on d net. So its all offline and i use blockchain when i need them online.
How do you use blockchain when you need them online and how do you get to cold safely?
I believe that softron means the blockchain-wallet, it has a pretty nice function to sweep private keys, you can even use your webcam to read a QR code for the private key.
You could make 100 x paper wallets and load them with 0.01 BTC each.
Then use them as "5 dollar bills", each time you need bitcoins you redeem a bunch of your 0.01 BTC paper wallets.