When it comes to the stability of their value, you will choose fiat, using it for your everyday life. Paying all the expenses or bills using it with no worries. Fiat is very safe! But when you like, to have an opportunity to make your money become more and to earn more, probably you will choose bitcoin. But ofcourse the value of the bitcoin is very volatile, It so risky, like when you are investing to bitcoin, you can never tell if you are going to be rich or poor. If you invest 10 years ago and sell it only now definitely you are a billionaire..In this world of crypto you have to be more knowledgeable before investing.