There is nothing like a "trusted website" as far as cryptocurrency is concerned. If you don't own the private keys to the wallet, then it is not your coins. I am not very excited about the revenue model for Freebitcoin. What are the sources for their revenue? How do they managed to give interest to the cryptocurrency deposits? These are some red flags for me, as unlike fiat currency Bitcoin never provides interest on deposits.

Fiat currency deposits can get interest payments for you, because fiat currency is vulnerable to inflation. So in order to keep the purchasing power constant, the interest payments are made. That is not the case with Bitcoin, as it is protected against inflation. Now if someone is providing interest payments on Bitcoin deposits, then their revenue model needs to be thoroughly checked to see whether it is viable in the long term.