From all i can see, Qryptos exchange is a Japanese exchange which is owned by a company, Quoine. It was founded in 2017, it is a multicurrency exchange that supports more than 30 cryptocurrencies and more than 60 trading pairs. This exchange no longer offers any trading activities, not on a bad note, but the exchange no longer exists.
Qryptos was rebranded into Liquid exchange, so it's of no use making any review about Qryptos since it's no longer an exchange, it niw uas a trading volume if $0, since it has been listed as another company in Revain, I'll suggest that you read reviews on Liquid Exchange before you can make any conclusion.
Remember, this is not a scam exchange, it was only rebranded to a new company, Liquid ™.