right guys
but we must also be careful with hackers ... we must use the second security google.authentication ,,
if its an exchange wallet, you need to protect with 2FA or google authenticator.
but that wont help much if the exchange is hacked, just like what happenign to Cryptopia, its an exchange from New Zealand. Losing a lot of fund because of hacker.
for me, if you have a lot of Bitcoin, having an offline wallet will be much better, but you need to keep the privatekey secure, and never lost it. otherwise you will lose all you fund. locked away in the chain.