The value is not guaranteed, so buying and using Bitcoin carries a number of inherent risks.
Many of us are still living into the old paradigm and are trying to understand bitcoin into the lights of it. Bitcoin has risk (just like Fiat currencies), but it has a huge upside potential for long term and this potential will release sooner or later. Unlike fiat cash, no banker, no politician, nobody can create any amount of Bitcoin from "thin air". Everybody must follow the same rules. The supply of Bitcoin over time has been programmed/set in place since the beginning. Thus, nobody can inflate or hyper inflate Bitcoin's value. No banker nor government can seize or freeze my Bitcoin account.
Unlike gold, Bitcoin weighs nothing and takes up no space. It cannot be detected by metal detectors or dogs or visually. Gold is expensive to store securely. Gold is very expensive and slow to transport securely. Bitcoin costs nothing or very little to store securely (opposite to what you said) , and little to transport securely and quickly. There is a lot of "paper gold" depressing its price. There is tungsten-filled gold. Hence those risks against these benefits are negligible.