There are some criticisms of the theory. "It was made according to the conditions of the time, it is now rotten. Because technology has improved. We can produce more food." I think this is a narrow view.
I agree, but I think it is partially correct. I think that one flaw in the theory is that the production increase is assumed to be linear, even though the labor pool is assumed to increase exponentially.
Bitcoin is limited to 21 million. About 40% have not been moving for many years. Total supply will decrease as people die. 21 million (*10^8) This number looks huge. Actually it is still scarce. Just like the resources in the world. The limited supply of bitcoin makes it valuable in the short / medium term. Can the Malthus Catastrophe be seen in bitcoin in the long term?
I don't think it applies. Other than being lost, bitcoins are not consumed, so there is no danger of running out. The problem is that a satoshi might eventually become too valuable to be useful.