Supply of Bitcoin is fixed, capped at 21M.
A circulating supply of Bitcoin can be changed, and only can be smaller by lost bitcoins. It will be always smaller than 21M.

Demand on Bitcoin only increases with time if the adoption for Bitcoin continues to grow more. I believe its adoption will become bigger in future.


To find good time to entry the market, you must find good psychology phase when people give up and are very depressed with the market.