What is the purpose of Bitcoin hacking?

Could you elaborate on the motivation behind Bitcoin hacking? Is it purely for financial gain, or are there other factors at play? Given the decentralized nature of Bitcoin, how do hackers typically target it? Do they seek to disrupt the network itself or aim to compromise individual users' wallets? Also, considering the significant resources and expertise required, is Bitcoin hacking generally undertaken by organized crime syndicates or are there lone hackers involved as well? Understanding the purpose and methods behind Bitcoin hacking is crucial in developing effective countermeasures.