now the question is must you gamble to make money?
No one must not gamble to make money, as there are several means to make money. Most people who are gambling to make money see gambling as the most direct means of making big money within a short time. They believe that if they can only get their predictions right that the money will be their own.
Are there no other means to make money or become wealthy except through gambling?
There are several means to make money outside of gambling. The millionaires and billionaires of this world didn't make their money through gambling. One can start a business or get a job to make money, so making money is not limited to gambling alone.
After knowing fully that gambling wins are not guaranteed, some persons don't even win at all within a year then why having such mentality of making money through gambling,
Wins are not guaranteed in gambling, that's it is called gambling. If winnings were guaranteed, it won't be gambling anymore. The fun of it is just putting your money where your mouth is. If it goes as you predicted you win if it doesn't you lose. The wins can't be guaranteed because you can't be right all the time.