[wmf]

The threat model here is people leaking their own Coinbase passwords (via phishing, compromised PC, etc.), so the 48-hour delay and out-of-band verification ought to actually help.

[kolev]

So, 72-hour delay is even more secure?

[AndrewGaspar]

Yep, and if you dump all your coins into an account with no private key, nobody can get your bitcoins ever, so that's really what everybody should do.

[kolev]

All sarcasm aside, Bitcoin is becoming more and more centralized everyday.