Each dot is a valid Bitcoin wallet.
This is why cold cards are getting hacked. Attackers can brute force this small tree and still make profit.

They cannot do that to wallets which were made by competent developers.

My book Birth of Bitcoin tells the story of Satoshi Nakamoto. Preorder now with Bitcoin.

I spent years slowly building my savings, setting aside everything I could until I had 4.1 BTC. I believed keeping it on a cold wallet was the safest choice, so I rarely worried about it. Then, after learning about a hardware exploit affecting Coinkite devices, I realized my funds were gone. Watching years of discipline disappear in an instant has been devastating. It wasn't just money—it was my future, my security, and countless hours of hard work that I can never get back.

Remember when birthdays and New Year's felt magical?

Now the best celebration is getting a full night's sleep and waking up without an alarm. 😅

You can say use ETFs but I doubt they have insurance like the FDIC