Realistically only two out of six can make you some money, the first and sixth option. Airdrops are nor really worth your time, faucets likewise. Steemit is heavily rigged and I would not recommend it especially not for newbies. I have never heard of crowdholding and it might be a valid option, I have no idea. If you have programming skills or if you can create content, you can work directly for crypto. But I would not go anywhere else. This forum is a good place to advertise your skills (Services Section) and get paid in crypto.
Investing time in airdrop is just a waste of time if I should say. To me trading is the best option. Traders who know their way around altcoins make huge amount of profit trading daily. Come toention steemit, it's only a good if not professional writer who earns on steemit. I have heard of another platform for publishing that pays but I haven't really checked it out. I will stick with trading and bounties for now anyway. They are good investments.