This folks is the magic number. Commit this to memory. There will ever only be 21,000,000 Bitcoin. Some Bitcoin have already been permanently lost like a treasure chest sent to the bottom of the deep blue sea, so there will never actually be 21 million Bitcoin in circulation.
Now, I know what you are thinking. How can you consider 21 million of anything as scarce? And isn't scarcity one of the key properties an asset needs to become a store of value? Yes, you are learning. But do me a favor. Open a new tab and look up the population of the United States. Divide 21,000,000 by this number and consider that if every American held an even amount of Bitcoin, this is how much each American would hold. Now, consider the global population. Do the math if you want. No matter how you slice it, there will never be enough Bitcoin for everyone to hold a whole coin, and it is never to late to start accumulating Bitcoin. I will say this every day if I have to: we are still early.
Stack diligently and let Bitcoin reward those who had the foresight to be early.