Cryptocurrencies do not have a standard price.
Each exchange has its own order book and offers different prices. The prices of each exchange are determined by the supply and demand within that exchange, i.e. the set of buy and sell orders placed on that specific exchange.
The quoted price is the price at which the demand meets the supply, i.e. it is the price of the last order executed on the exchange's order book.
Compared to purely informational sites, however, the exchange prices are different because these sites average out the prices of various exchanges, or report the price of only one exchange. You cannot use these sites as a reference for Young Platform prices.