BITCOIN is cryptocurrency everybody know. and the it is not secure and not predictable money . now we talk about point that do you know when bitcoin was first time existed in market at that time 1 bitcoin value lower then 10 cent or 10000 bitcoin value just 1 pizza or 10000 bitcoin just 100 rupees. nobody didn't understand that it value increased by 200000 time. if you had invested 100 rupees or 1usd at that time now you have 4.6 crore rupees or 668944.88 united state dollar.
but the king of share market warren buffet said that it is not safe to invest.
bitcoin is all about is demand and supply.