Yeah if things goes smoothly in future then it can bring huge profits for us but the fact is no one can assure its success and no one knows what will happen in future so its a big risk to take of investing all your money in bitcoin as if it disappears in future then it will make us beg on the streets for food and its always smart not to invest all your money at a single place and divert your funds at different places to divide the risks.
I have not invested my all money in bitcoin and I won't do it anytime until I acquire superpower to see the future with 100% success rate.
Bitcoin is amazing invention and I believe more and more people are going to use it in the future but I am (and no one) not 100% confident about it hence, it is the best way to invest as much as per losing capacity so that any incident wouldn't affect our lifestyle.
Yes, higher risk gives higher returns but at the same time, the chances of losing whole capital are also large. I am quoting Warren Buffet here, he says "Never test the depth of river with both feet". If you can afford to meet the results even in the case if it's not in your favour then you can go for it otherwise don't.