Is it safe to keep a couple BTC in a Coinbase wallet? If not, what is safest web wallet? Also, how safe is a Bitcoin wallet on a phone. I use the Bitstore app on iPhone as my "On the go' wallet.
Please don't use coinbase.
First off, you don't actually own the BTC since you don't know the private key. You just have coinbase's promise to send you BTC which as we saw with gox can easily be broken. Moreover they're not paying you any interest so there's no real reason to choose this over just securely holding your coins.
Also I've had bad experiences with coinbase in the past and I can surely say that they're not the straightest shooter in an industry filled with shady characters.
If you want to hold Btc, here's what I recommend, especially for larger sums.
Take any computer you own that you can afford to wipe. Can be very old.
Download electrum.
take the computer that you can afford to wipe offline.
Generate a new wallet on that computer.
Write down the seed of that wallet.
Now
Download electrum on your primary computer.
Import the master public key into your primary computer.
Then
Wipe the disk of the computer you used to generate the wallet.
Congrats you now have an arbitrary number of very secure cold storage addresses all of which can be accessed through the paper you used to write down the electrum seed. Even if both of your computers are filled to the brim with trojans your wallet is safe.
Enjoy.
Thank you so much! I will do this, I have a shitty laptop I can wipe
Glad to be able to help. The more people are smart and keep their coins safe the less of an impact the next goxxing will have on the community.
One more question, is it more safe to keep a wallet on Linux (Ubunutu) or Windows
Yes but don't keep more than a couple coins there. That's your literal wallet (like the cash in the wallet in your pocket). What I suggested is the btc equivalent to money in a savings account.