If the stock price increases, your holding profits in BCH increases. So market cap of BCH increases. My statement mistake is that we’d all have to be all in AMZN.
If a lot of us have BCH profits growing from stock investments, that would increase BCH market cap assuming a lot of us invest in stocks. I’ve doubled my BCH for example.
With certain brokers (such as SimpleFX), u can buy stocks with your BCH. So if a stocks price goes up, your BCH profits grow. I have pic of my portfolio in this thread to illustrate.