10 ways to earn bitcoin:
1. Earn bitcoin via buying bitcoin and holding them for a long time.
2. Earn bitcoin via bitcoin mining.
3. Earn bitcoin via bitcoin cloud mining.
4. Earn bitcoin via trading.
5. Earn bitcoin via bitcoin affiliates.
6. sell goods & service for bitcoin.
7. Investing bitcoin peer to peer loans.
8. Earn bitcoin via gambling.
9. Become a market maker to earn bitcoin.
10. Participate on campaign to earn bitcoin.
there are many ways you can do to get Bitcoin as you mentioned above about 10 ways to get bitcoin, of the 10 ways that I think is most effective in generating Bitcoin is to follow Bounty campaign and trading in addition I do not quite understand how to do it