Hey guys,I heard that cryptocurrency aren't actually stored on hardware wallets at all.
Ledger have written a couple of good blog posts for beginners, and one of them covers this topic. You can read it here:
https://www.ledger.com/back-to-basics-part-1where-are-my-coinsSo,I guess Trezor have a secure element as well,just like Ledger?
Once I get Trezor,I won't have to worry about that someone can hack into my Coinbase account whether I'm offline or online and steal anything?
Correct. Like others have said before me, the Trezor itself doesn't hold any bitcoin/crypto.
Not quite correct. Trezor does not use a secure element like Ledger does, which is part of the reason why Trezor devices are vulnerable to seed extraction method Lucius has mentioned above. That's not to say that Trezor devices are worse than Ledger devices though, and both provide similar levels of protection when an attacker does not have physical access to your device or when using a long and complex passphrase.