I will go with trading, arbitration and participating in campaigns and bounties. HYIP to me like gambling you must time it when to go in and when to run out.
although there are so many other source of getting bitcoin for example signature campaign, faucet, gambling, lending bitcoin, trading altcoin, holding bitcoin itself, and if you have some good skill about designing then you can also make money from designing. but to me i will choose trading altcoin because from trading altcoin we have good opportunities to make good profit in a short period of time.
Agree..
we know that there are a lot of options to earn Bitcoin nowadays, but question is that, which is the best way to earn bitcoin..? so always suggest that trading would be the best source of bitcoin. there are huge opportunities to make more bitcoin from this side...