The value of Bitcoin is derived from its adoption as a store of value and payment system, as well as its finite supply and decreasing inflation.
Although it is nearly impossible for Bitcoin itself to be hacked, it is possible for your wallet or exchange account to be compromised. This is why practicing proper storage and security measures is imperative.
Investing or trading Bitcoin only requires an account at a service or an exchange, although further safe storage practices are recommended.
You can also purchase Bitcoin through mainstream services like PayPal and Robinhood.
One way to own Bitcoin indirectly is by investing in companies that have bitcoin