How many btc do you think i will get..... thx
That question is like putting your arms around jello! If you get really good at mining the most profitable alternate crypto coins and become proficient in trading on a crypto exchange you may be able to make betwween .001 - .003 BTC/day
The dynamics change by the minute, coin profitablity changes, exchange rate changes, accepted share rate will change etc.
Start out with one computer and see how much you like it.
Use
http://www.coinwarz.com/cryptocurrency to determine the best coin profitablity.
Start monitoring or trading coins on a small scale at an exchange like
https://bittrex.com/ or
https://www.cryptsy.com/View the posts at
https://bitcointalk.org/index.php?board=159.0 to keep abreast of what's trending.
And most of all, HAVE FUN