I choose others (signature campaign, your skills & etc)because there I can use my knowledge.
signature campaign is one of best source of income now adays because you need only some ffort and time to earned butcoin everyweek and you need only high rank to get good payout. Unlike the other option the payout is little and you need to spend to much time.
i also consider trading as one of the best way of making bitcoin. but for becoming a good trader you need to have good experience in trading, you must study the trading market on regular bases and only then you can become a good trader.