to me I understood that the 21Million seems to the total number of Bitcoin going to be in existence from my research,so I wandered how?....For instance if the investor's eventually purchase them all(if possible)and all the bitcoin miners have mined the 21M finish,does that mean bitcoin is going to be scarce ?
If yes then how would upcoming investment be able to purchase it because if after the existence of 21M,bitcoin may be difficult to purchase in the future and due to the scarcity of bitcoin from my logic there will be increas in demand and obviously the value of each bitcoin could rise seriously.
What's your thought about this and how would the investment decisions will be in future?
Bitcoin can not be difficult to purchase. Even 1 sat is relevant. If bitcoin become scarce and its price increases, the quantity that individuals will purchase will be small because of the high price but everything will be normal as usual as they will still be able to purchase the right amount that they want to purchase.