While playing the game, I observed that of I stake with little amounts, I looses to the computer but if I stakes with a huge amount I usually wins and I could visually see how much huge amount I have accumulated from my winnings.
Therein, I had to have that thought that I wish I could win this much in a real life gambling.
These websites that has demo games are programmed to attract you to invest your money into their website. They want you to feel that "If you can win a huge amount of money by using a demo account, you can do the same and win the same amount of money when using real money". Unfortunately, this isn't the case for most of the gamblers.
I know it because I've also tried it. I've tried to play these demo games on a particular website where they will give you money, but obviously fake ones - just to enjoy the game. When I saw that I'm winning huge amounts of money, I felt that I might win the same if I deposit some money, but the good thing about me is that I know how to control myself hence, I didn't deposit any money on that website and just continue playing using the fake money.
Don't fall to these tactics by these casinos. They're only playing with your emotions.