If you already have a stable and more than sufficient income then you can enjoy what you get and don't need to look for anything else. However, if you want passive income then you can start by investing. If you have a lot of money, then the investments you make will have lower risk than someone who has little money. The concept of Bitcoin investment is actually simple, we just need to hold it until the target price we want is reached. If you have a lot of money then you don't need to rush to sell your bitcoins because of a sudden need, if you can do this then investing in bitcoins is a very good way for you to aim for financial freedom in the future.