With each halving, the period until a new Bitcoin is created doubles. It will become increasingly difficult, incredibly difficult for anyone to obtain fresh Bitcoin as time progresses.
Maybe your statement here needs more clarifications, bitcoin is at its best and nothing will depreciate it value, rather this will increases over time, maybe you will need to explain what you mean by the difficulty in obtaining a fresh bitcoin over time.
Currently, it takes 96 seconds to create one Bitcoin; in the next halving, it will take 192 seconds - 3 minutes and 12 seconds - for each new Bitcoin; fast forward to 2092, when it will take 1 year+ to create one Bitcoin, and the price must have skyrocketed to $2m/BTC; tell me how many people will be able to obtain one at this rate- it becomes increasingly difficult to obtain one as time passes.