Bitcoin is a closed system because it's not an invention, but it is a discovery. Stock market, and usd, are inventions, and what makes bitcoin a discovery is the concept of proof of work, and it is

closed because its not possible to rediscover it.

And if it's a closed system, you have to agree with me that entropy is applied. Entropy means decentralization, common markets are not subject to entropy because they tend to centralization, but bitcoin tends to

decentralization, and that means natural selection is working on bitcoin, because natural selection acts on decentralization.  

But on natural selection there needs to exist a loser and a winner, because that's how it works