Bitcoin is a belief system, the same as the US dollar is a belief system. You believe in the US dollar, because you believe in your government to protect your wealth and purchasing power with the money issued by them. However, your government is run by powerful people with self interests, that in many cases may not be perfectly aligned with the people they govern. Therefore, these folk may choose to spend money they don’t really have in ways that help themselves, and their friends. They can spend more than they have because they can create as much more of the money as they care to. By creating more money into the economy, they create the hidden tax on there people. Creating money does not hurt them, because they receive it and spend it into the economy as soon as the get it. As the currency created circulates into the economy, the price of everything goes up, because of the over abundance of this newly created money. This over abundance of currency hurts every person who has savings, and every working person who needs to make wages earned, meet there cost of living needs.
Bitcoin is governed by computer open source code. Everybody is welcome to look at the code to see how it protects the wealth accumulated in it. No government, or single group of people can control the issuance of new money. It’s already programmed in, as to how much and how it is issued. If you learn how to save it, earn it, and spend it, you can use it and take it anywhere in the world. Every day more and more people around the world are believing in it. This creates the liquidity of it to be able to use it to meet or exceed your cost of living needs.
The controlled issuance of Bitcoin guarantees that its future value in terms of the US dollar will continue to grow. As in the case of the dollar, the creation of dollars by your government guarantees that those dollars will be worth less in terms of product and services, as each year goes by.