There are so many ways how to get Bitcoins and other cryptocurrencies.
You can mine them if you don't want to manually do it.
There are some investment party that recommends you to pay them and your money will goes up in just a couple of days.
There are some sites which allows you to play gambling games using your Bitcoin.
My most recommended is claim from faucets, it is free but you need to work hard for you to earn Bitcoins.