why people still store on online wallet, is behind me, my advice:
buy a old laptop, and leave your wallet there, use that laptop just for that nothing else, like if it was your bank
a hw-wallet like trezor or any similar one is the best solution i think.. This would also remove the risk of malware, keyloggers, etc. And might even be cheaper than an old laptop.
i recommend the Trezor "wallet" from slushs company satoshilabs.com. (
www.buytrezor.com) - heres an interesting review:
http://www.coindesk.com/review-bitcoin-vault-trezor-lives-name/heres a nice overview on all the hardware-wallets for btc:
https://bitcointalk.org/index.php?topic=899253.0