Start with 1/10 "blocksize" of your balance (on same adress), should be ok. Over the time it goes to a size of 1000. there is no optimal blocksize for a start like noblecoins or netcoin, our algo is better. I test these coins months ago for a "long" time and the winner is BitBean    fair algo, great stake rewards, many nodes, fast network and a minimum of cpu utilization. this are only the technical benefits  

you can stake with a size of 1BitB but it takes a long time but is it not impossible. search in the blockexplorers