Do you think bounty campaign helps me to earn money to sustain our daily living?
You can only earn few ICO or bitcoin in bounty campaigns, but expect that you can only earn a small amount that I think it's not enough for living daily.
I would like to ask some members here about What is difference about investing and trading. Because I don't have ideas which is better investing and trading?
Investing is just like you invest in the coin that you can you use for trading "buy low and sell high" but there are other investments are too risky and scam like a ponzi scheme or any promising project, but in the end, they will run your investment.
Trading it is like a gamble so make sure that you can control your feeling. However, Trading would be the best choice because you can invest in top 10 coins listed in coinmarketcap that I think could give you huge profit if you invest a good amount of money, but you must wait for a long time and wait for enough price to sell your hodl coins in the right time. Its still investment as well.
Can I start in small investing and trading, when do I start?
Yes, you must start with a small amount so that you won't lose too much if you did wrong in trading just keep learning how trading works.
Experience is the best to have until you learn and become a pro.