The best BTC wallet is the cold wallet. Keep your currency out of the web. This is the best solution. But, If you want to keep them, online, feeling safe, just use cryptocoin pro platform. It is also a good exchange, that guarantees 100% security for your BTC and ETH wallets.
It's called cold storage and there's no such thing as "the cold wallet".
Electrum already has been mentioned a couple of times, and it also offers a cold storage solution:
http://docs.electrum.org/en/latest/coldstorage.htmlSo if you want a safe solution, but don't want to spend any money on a hardware wallet, this is the way to go.
Don't use exchanges as wallets. Exchanges get hacked, get busted, run away... many ways to lose your money while storing it on an exchange. Especially avoid exchanges with no track record such as the one mentioned above.
For ethereum and erc 20 tokens ,myetherwallet is a good option. For bitcoin you can use ,electrum, coinbase, blockchain.
From my experience, the best bitcoin wallet is the local bitcoin wallet(
https://localbitcoins.com/) because it has a lot of functions than the bitcoin blockchain wallet. [...]
Do not use coinbase, localbitcoins or any other exchange platform as wallet. If they go bust, you lose your coins. If a hard fork occurs, you are at their mercy whether you see any of the hardforked coins. Use blockchain.com if you absolutely persist on the comfort of a web wallet. But do not mistake an exchange for a wallet.