Well I think the basic ones are ;

• Profit or returns over time
• Security
• Flexibility

As for profit and returns , Bitcoin is a good asset in that aspect which is very obvious from it's progress overtime

As for security, as long as you keys and seeds are intact and free from hacks, your Bitcoin investments are as safe as possible.

While most investments are rigid Bitcoin is not as you can decide to no longer be an investor and sell off all your coin without breaking a sweat. Except you are a whale🙂 and when did most whales quit their BTC investment?🤷