Bitcoin is not backed by any physical asset like Gold nor by any fiat currency. It makes me wonder if I should invest/trade in Bitcoin or not?
Do you know what makes something valuable or not? YOU, nothing else.
As the Austrian School of Economy teaches: The value of things is always subjective. You can be about to die in a desert carrying a gold bar, but right there water is more valuable, without your life the gold is worthless.
It doesn't matter how much it cost to produce, or how many hours an artisan worked in a sculpture, for you it may be thrash and for another person treasure.
This is the real fact of the value of things. There is no intrinsic or extrinsic value; its valuable to you or not, period. The consumer has the last word, not the producer. Never forget that.
Guess what?, the amount of people who think its valuable to them, and those who think its not, is reflected in the market. And the price is the result of both forces. If more people think its valuable, price goes up, if more think its not, price goes down, simple.
You can then ask why so many people think its valuable? That's where you have to start studying it, find the truth about money.
Backed in what? That's a promise made by people, promises can be broken. Once upon a time the USD was backed with gold, but that promise has long been broken. Do you trust people to keep their promises? With Bitcoin, there is no one to trust, the code runs as it was written and won't change because a politician or banker chooses to.
Keep studying and discover why its so valuable to so many people, regardless of what some FUDsters say, Bitcoin goes on.