# Never put all bitcoin in one wallet
This is only true if all the wallets you intend using are open source and are in a safe device, otherwise you would only be giving yourself a false sense of security. One cold wallet that is properly backed up is much better than so many closed source wallets in different online devices that are used to access anything over the internet.
If you also struggle to find a safe location to keep your backups, you should consider reducing the number of wallets you have, so that you have less seed phrases to back up securely.
You are right, even if he use many different open source wallets it still makes no sense because having more than one private key or recovery seed to keep can be too much to handle or even cause confusion later.
Many whales wallets holding hundreds of Bitcoin have just one wallet, it's enough to hold their Bitcoin for years and here we are today, these whales still have their Bitcoin intact, having more many Bitcoin wallet either it's open source or not makes no sense.
The only thing worth watching out for is the company that made the hardware wallet and make sure it's open source, I prefer the air gapped wallets because internet connection is the real problem with any crypto wallets today, hacks and attacks are carried out with the Internet access.