A very recurrent question I get is "J, where do you keep your BTC?"
Well of course all depends on how are those BTC intended to be used.
Here the common uses of BTC:
1) Hold long term
2) Trading
3) Mix of 1) and 2)
Where to keep them in each case:
1) A long hold requires the minor risks, and for that we need an OFFLINE WALLET. Example of the basics: MultiBit HD. After downloading the wallet, the blockchain will sync and download a big chunk of data to your hardrive. It is useful to sync just to check if everything went smooth on the transaction to be held offline (you can also check at blockchain.info/address/ YOUR WALLET ADDRESS). Once BTC are confirmed, what I do is to make a copy of the .dat file from the wallet and save it into 2 different USB drives PASSWORD PROTECTED. One goes to my safe, the other one goes with me all the time. As all info is saved on the blockchain, the only important fact is: KEEP THE .DAT SAFE and OFFLINE. Just an electromagnetic pulse could destroy that wallet :)
2) Depending on how often you trade daily, keep BTC in a fast and simple wallet like CoPay or BitPay, or just in the online trading platform (Bitfinex, Bitstamp, Poloniex, Bittrex, etc)
3) If you are not completely sure, then Trezor might be for you! Check out this video:
Hope you found it useful!
J.