I will choose campaign. No money will be required to campaign and there is no risk. I earn good money by bounty. On the other hand, trading and gambling both are risky and capital required.
I guess campaign also need money to start it, internet connection needed for it and yes, we must buy it with money. Personally, I also do like you, but after receive my rewards from campaign, I always hold it or exchange it into best assets, yes I'm crypto holder. 