I would not go as far to say that bitcoin is a gamble but it can't be a magic fix to whatever the issues are in fiat. The thing is fiat's issues are its own alone. Bitcoin is not meant to replace fiat. But it can serve as an alternative. Right now, since bitcoin is not massively adapted by everyone and every country yet it makes it harder to completely make use of bitcoin and use it to its maximum.

Now fiat is still needed no matter how you do not like fiat, it is almost impossible to live normally without some fiat on you. I would like to see someone live with just bitcoin. So no it is not a magic fix but I believe that bitcoin has been reliable and stable enough to not be called a gamble.