The more time you have to spread out your risk the better. That will say the more time you have paying attention to Steemit the better deals you can do. You can also be very tactical and go for a balance of some 1% ROI all the way up to 50% ROI when lucky.
The more you have the better. Even the 1% adds up quite quick! The more genuine you can be the better. Since you can then build relationships with high level stake holders which will boost you a lot and your success. I don't really focus on pure profit maximise I rather take many small wins instead. You can build million dollar relationships here. That can be massive value!