There are a lots of ways of earning Bitcoins.
1- Faucets
2- signature Compaigns
3-Trading
4-Gambling
5-Lending
You can search each one of them and see the options which are suitable for you.
if you think thats the only ways to earn. then you have already failed.
your 5 listings are:
1&2 the penny grabber methods, (low income for alot of labour)
3 okish with enough investment and only when using trusted exchanges
4&5 risky and more chance of loss..
remember bitcoin is just a currency there are millions of ways of earning it. getting a job that gets paid in bitcoin. starting a business, freelancing your skills.
think beyond the small stuff that promises free money and think realistically about the bigger picture. then you will see there is far more opportunity then the risky time wasting stuff