There are currently three ways to steal Bitcoin. First, hackers infect crypto asset exchange servers with special malware via e-mail, websites and popads and infiltrate devices. This happened with the Binance hack last year.
Second, take apart the Bitcoin hardware wallet and get the seed phrase. This has been practiced by Kraken against Trezor.
Third, hacking into the Bitcoin blockchain network itself through 51 Percent Attack. This third method is considered expensive, but has the potential to get the largest loot than the other two methods. This third method, according to observers, will cost up to US $ 21 million.
I wonder where such statistics come from, especially regarding the last point. 21 million dollars is not even one percent of the total turnover of money in bitcoins. I.e. it turns out that this method of fraud will not be quite dangerous on a global scale. I think you need to be more afraid of just losing your wallet or forgetting your private key. I have already lost a very large amount of cryptocurrency.