Treat all altcoins as one coin, called Altcoin. Therefore, there are only two coins in the market, one is BTC, and the other is Alt.

The total supply of BTC is fixed, at only 21 million, and as more and more people withdraw BTC to cash, the circulating supply of BTC in the market decreases, leading to higher prices.

The total supply of Altcoins has no upper limit, it is a coin that can be infinitely issued and unlocked. The number of Altcoins in the market will continue to increase, and although the market capitalization of Altcoins is increasing, their prices are decreasing.