Suggestion: "Not open source, not your wallet" should be a crypto mantra.

Too many words have been wasted over Ledger, and people seem to be oblivious to the main problem here: closed source crypto wallets are idiotic. They have been a serious problem for a long time, and there's no reason they should exist or that you should ever use one.

Any project or developer that suggests you should put your crypto in a closed source wallet for their dapp or chain should be called out and discredited for admitting that they do not give a rat's ass about decentralization or crypto. Closed source completely defeats the purpose of crypto.

It would be smarter to sell your crypto and put your money in a bank than to trust a closed source wallet written by your favorite crypto Twitter team. You might as well KYC and trust Venmo, PayPal or Zelle instead. At least you will know who stole your money.

Edit: OS hardware wallets do exist and you can even build your own with OS code.

Edit: Rebuttals to fallacious arguments:

1) "Well you have to have to have faith in science so you might as well have faith in the most implausible stories about sky daddy."

Closed source software that can connect itself to the internet is 1000x more risk than proprietary hardware that cannot, but with zero benefits. Notice that I intentionally never mentioned Trezor or Jade because the debate about what you do instead of putting crypto in a mystery box that can unilaterally send your data to the developer is way less important.

2) "There's no way you can keep anything from ever being stolen, so you might as well leave your keys in your car."

It's debatable if any hardware could ever be uncrackable, even theoretically. And that's a red herring. You dont have to use a Trezor and your backup keys can always be physically stolen no matter what you do. The idea of having 100% security when someone physically possesses your wallet is a myth, and a totally unrealistic standard by which no other thing would be held to. Needing to physically access the device is not comparable to the risks of closed source software.

3) "Open source doesn't make a bug/attack impossible."

Of course not, but it's still a basic first step that always adds trust if you don't do it. Again, taking your car keys with you doesn't guarantee it won't get stolen, but it's the least you can do, and if you aren't going to do it, then you are saying that you do not care about it. OS is a fundamental axiom of crypto. If you disagree with it, then there's literally no reason for you to use crypto (and most of this sub clearly should not be putting serious amounts of money in crypto).