Most of the investors in stock market don't consider cryptocurrencies as better option but have a negative viewpoint about it due to many factors and volatility and price manipulatuons are one of them.Hope we don't see that type of economic crash again but to imagine the situation we can say that investors would rather opt for a safe rerurn business like gold or real estate as its easy to invest in them.But crypto business is not easy to understand and you have to choose the coin and understand the technical details of working which takes time.So market crash will not have any major effect on btc or any other coin.