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Knowledge is most important in bitcoin holding and how you handle your portfolio from not been attached by scammers and hackers is the best form of security you can provide to your holdings. When you own more than 1000BTC and have no protective measure for it, a person with less than 1BTC and have it more protected should be regarded as a whale and not you.
An in-depth knowledge of Bitcoin is certainly important for those who even have 1000 BTC, but I think people who own up to thousands of Bitcoins must have the best security knowledge that matches the number of bitcoins held.
But there are some people who do have a lot of Bitcoin from the beginning of Bitcoin appeared and they still hold on, because of their ignorance or forgetting that they have a lot of Bitcoin, Without good security and only using ordinary devices that were installed in the Bitcoin Wallet at that time.
Now the security to store only 1 BTC or that less than that, Already using a type of storage that has high security by using a hardware wallet and storing the seed phrase in a different place that is safer, it must be done for now to be safer.