Making money with bitcoins without the need for altcoins is a lot by having you continuously buy bitcoins at the bottom of the bitcoin wave and sell them off at peak prices. This requires a good amount of bitcoin knowledge too. understand it but still have a way to generate interest of bitcoin is that you can invest somewhere to generate profit day or month.

If you are good at multilingual, you can search for translations of things you know. On the IOC websites they are developing they are looking for people who can translate in more languages for better development on the multinational. You can find it on this forum in the topic service