looks like he should read more and seek more information about cryptocurrencies. because there's no way 95% of cryptocurrencies are scams. indeed there is a lot of fraud going on in cryptocurrencies but it is impossible to reach 95%. because if that happens then there are currently no cryptocurency users because crypto is considered a fraud area.
Fraud exists in all areas of investment, not only in cryptocurrencies, but the cryptocurency environment is a suitable environment for them because it is decentralized and they can not reveal their identity, but I agree with you that 95% is unfair percentage because there are many honest projects and there are many investors in the Cryptocurrency field.