1. it is possible to get rich in a very short period of time through gambling but it is not really recommended since it also involves major risks.
but you have to take big risks to get big money in your case.
if you are ready to take this risk then you can go ahead.
2. just do trading with altcoins and if you get lucky then you may become rich in no time.
3. you can offer some services like lending, writing, painting, etc to earn some extra money. and believe me, many people got rich just by offering their services.
4. its all about luck and some knowledge ofcourse. if you have both then nobody can stop you from becoming a millioner.