Well, stock market is not scam but yes there are people mainly traders who manipulates markets up and down for their own profits but in the long run you will find stocks of big companies always grow in value due to the fact $$$ (currency) always devalue.
Example, if you use to buy a bread in $1 few years back you may be paying $2 for same bread, so $$$ lost its value and now you need more $1 to buy same bread which you use to buy for half price year back. In this way value of stocks will also increase in value in long run, you just need to know when to get in and get out.
An small retail investor should always invest in stocks at lower levels in companies who's fundamentals are strong and company have solid business plans and growth opportunities , example, dell, Macdonald's, coca cola etc., these companies will always remain in business hence there share will retain its value, when you see nasdaq at 1800 levels, make some investments in these shares and then some more investment on every 100 points fall to average your buying. Then after 2-3 years when nasdaq will again gain 1500 points you will find your stocks value have double or tripled.
If you think stock market is scam then stock markets are not for you. You should look for other kind of investments or invest in mutual funds.
Remember, stocks markets run on sentimental because ultimately its people money which is invested in the market. Nobody will invest in economy when its not performing good because people sentiments will get lower and lower and when recovery starts everybody will start buying like there is no tomorrow. You have to understand this and wait for correct time.