This is one of the reasons that traditional investors and big investors are afraid to enter this market. Large-scale attacks by hackers on websites, trading platforms, to steal assets Cryptocurrency is always an obsession for investors. We need to have a solution against hackers, this market is very potential but it does not attract many people, because it is too risky.
Yeah may be majority of big investors are afraid to enter but not all of them, check the market cap of cryptos it is now around $211,087,421,197, that means still we have big investors in the market.
Scammers and hackers are always there even in the traditional market, even in online banking there involves huge risk, in fact cryptos are more secure in every aspect than online banking if user is fully aware of it.