21M is the theoretical cap. At the moment there are 20M and more are constantly being mined. Miners have to convert bitcoin into real currency to pay for their electricity both for mining and transaction fees. This means that there is always a supply of bitcoin for sale. Which is fine if there is still demand for new bitcoin, but who's buying bitcoin these days? It has underperformed both the S&P 500 and gold over the last 5 years. I expect bitcoin inflation to continue. (AKA the bitcoin price to continue to go down).