bitcoin is a currency, like any others.
you can set up a business buying products from suppliers and selling them for bitcoin. keeping the profit as bitcoin.
you can search out existing bitcoin businesses to look for jobs and ask to be paid in bitcoin
if you have coding skills there are loads of projects you can join, or even make your own project
but stay away from the "investment schemes" that promise profit, they are 99% scams. and you will lose out.
gambling is also a risk. so try to stay away from them unless your playing for fun and dont care about possibly losing