I usually tell people that no matter how good an exchange appears to be, they should not be trusted with your asset. It's extremely dangerous because anything can happen and they can be compromised at any time. Keep your asset in a non-custodian wallet at all times; if you need money, simply withdraw the required amount to the exchange. I've never heard of the Remitano exchange; in terms of security and popularity, I'd recommend Binance or Coinbase.