Currently, I have been using Ledger X. We know Ledger is a trusted hardware wallet manufacturer. But lately I don't have enough faith in Ledger when it's a matter of storing a large amount. I am not saying Ledger isn't trusted due to my faith. Its just my personal feel about Ledger due to its closed source. More importantly, their backup service is one of the worst things in crypto, though it's not mandatory. Backup our seed with a third party for a hardware wallet won't make it secure anymore.

So here is my concern: I want to move to a new secure, smart, and open-source hardware wallet. And I want to know about the secure chip used by Ledger. Lately, even Trezor started using Secure Chip. So with a secure chip, can we trust that the wallet is safe and doesn't have a chance of being drained by the manufacturer?

I need a multi-currency hardware wallet that is secure, smart, and open-source, price really doesn't matter. One of my choices is Keystone due to their wallet design, especially the fingerprint system. But it seems they used three secure chips, and I am not much aware of whether the manufacturer can drain wallets somehow through the secure chips.

Please suggest details and why you think I should buy this.