With the hard fork approaching I saw bitcoin.org suggests to shun away from the hard fork adopters such as coinbase, blockchain and xapo? Any good online wallet to use?
Does anyone know those which online wallet those big exchanges such as bitstamp, kraken, bitffinex use? Do they use 3rd party hot wallet or they are using their own proprietary online wallet?
Keep your bitcoins in a wallet where you can control your own private keys. Something like electrum, armory, bitcoin core. That is the safest way to go about things. Blockchain.info has a sophisticated export procedure now and i wouldn't recommend them.
Never use a 3rd party when it's a hard fork coming up. You're putting too much trust in them for no reason.