Bit Coin Wallet

[edmond_dantes]

Best to keep all your bitcoins on your local client like your PC or phone on electrum

and always keep multiple backups with password encrypted in different locations

[PX-Z]

if you work in bitcoin,you need a bitcoin wallet.

Much better if you specified on what bitcoin wallet after all there are too many kind of bitcoin wallets, not mentioning all of them I will just recommend like electrum desktop wallet as on of the safe wallet and of course it depends on the user itself and the device used because if the user is careless and the device is unsecured then the security given by electrum is useless.

[Harutooo]

you must keep because you can gain more from price high 

[PinkB]

Exchange wallet is not safe,you need to withdraw your bitcoin and keep them into a hardware wallet or mycelium wallet. exchange site can be hacked anytime.so try to move them into a safe wallet and keep the private key.

[TheBTCAlex]

I use Electrum wallet now, and since you have 2 bitcoins, it is really a substantial  amount, and I would suggest you not to store it on exchanges like Coinbase, or on online wallets like blockchain.info, as they have a higher chance of getting hacked than local wallets. Also, if exchanges shut down, theer may be nothing you could do to recover your BTCs, and also, you are not in full control of your money.

With a wallet like Electrum, all that changes, your coins are much more secure, provided that the PC that you use it on, doesn't have any viruses, and is secured, and of course, has an antivirus on it (duh). You are also much more in control of your money this way, you have a lot of flexibility over transaction fees, and have full control over your private keys.
If you plan on storing for years, I would recommend, an offline computer, with multiple backups of the wallet on various offline drives, or even you may try to use a paper wallet, or cold storage, whatever, but do remember to keep a backup of all the wallet stuff.

[WildWestRider]

Not only can exchanges be hacked, but sometimes maintenance causes them to shut down for longer than you want, should you need access.  Just use exchange wallets for daily trading.