Online Casino Practice Are Online Casinos Rigged?

Are online casinos rigged? - online casino practice

In playing blackjack at 888 after downloading their casino. I've spent $ 200 in about 20 minutes 3grand with the play of practice. Is this a trick to think only that I really could earn money to give real money and they take it? Some online casinos will be tested, or what? Thank you for all the information.