from what i understand, bitcoin is considered the least risky crypto … Almost like a gateway drug / poster child. If Bitcoin, the most widely adopted and largest market cap coin, fails than who in their right mind would invest in lesser known, smaller cap coins. Institutions and bigger retail investors who want exposure to the crypto market , will most likely start with BTC and in market down trends will sell off their BTC and alt coins together. Also, the same laws and regulations and bad news that apply to BTC will most definitely apply to all alt coins. BTC is almost like a market index in this sense. For other cryptos to succeed , BTC needs acceptance as well.