We can make a system where grains of sand stay only inside that system. But they are still grains of sand and thus, abundant in quality. In the same sense, bitcoin is still a number and numbers are infinite in quality. Btw, I am not criticizing bitcoin. It would be stupid to criticize a number. I am criticizing irrational human behavior.
Like I said, you simply cannot criticize adequately something you fail to grasp due to your lack of knowledge, even if that "something" is someone's behavior that you for whatever reason consider irrational. If you don't understand the difference between the numbers inside the system and outside the system, and if you don't understand how the design of the system works and how it makes numbers scarce, then go and find out. If you think bitcoin is abundant like sand, then go and dump the market with unlimited bitcoins printed out of thin air. The problem is you can't get these special numbers that are inside the system for free, you must pay for them. Unlike sand that exists in abundance outside the box, bitcoin doesn't and can only be obtained through hard work.