Investors will think of the cryptocurrency market as an alternative to traditional investment products, I thought.
Nevertheless, I was making the point that those two markets have a negative effect on one another.

During a downturn in the stock market, investors will start looking for alternative (more profitable) investments and turn to Bitcoin and cryptocurrencies.
The last days' stock market crash has led to a decline in the market cap of the crypto market.

What impact does the Stock Market have on Bitcoin's price?