Because there are several types of investors in the cryptocurrency world.

1. Long term Holder
The one that is investing in Bitcoin for long-term holding must be very happy to see the price drops and drops again, moreover exactly heading to the bearish market. They will be grateful because they think that they can buy more to save Bitcoin and Hold until the next bullish trend.

However, it will be different for short-term holders or moreover daily traders of Bitcoin and moreover altcoins. They will be panic and not good if the price keeps decreasing because they will lose their money if cutting loss. Or if they sell the tokens immediately. But they may be also confused if the coins are not sold, the coins will head to dead coins. this is dillema. That is why investing in altcoins are riskier than in Bitcoin