Is it really the best way to invest your money?
Because of the way Bitcoin generates value or becomes more expensive, it could potentially lose all its value and became worthless.
Who assures you that this will not happen?
When you invest your money in any asset a certain degree of risk needs to be accepted, if for you the risk that investing in bitcoin entails is too high for you for one reason or another I do no have any problem with it, find another asset in which you are comfortable to invest then do so and call it a day, it is that simple, now technically there is not really anything that has intrinsic value as things do not have value just for existing, they have value for their characteristics, and if you think that a decentralized network in which you can send your money all over the world without any third party interfering with it has a value of zero then that is your call, but do not expect everyone to agree.