May I ask what your "business idea" is ?
I am still developing my ideas, so it would be unwise to try and describe my embryonic concepts now and risk being misinterpreted.
I would say that to me POS coins on a crypto 2 platform like NXT & NEM resemble virtual real estate, but unlike physical real estate, POS 'real estate' on a crypto 2 network can move around.
For some ideas you need a lot of 'real estate'. A block of flats, a shopping mall, a hotel, a fun park, a casino etc
Imagine if virtual real estate could relocate to anywhere on the network at zero cost in an instant.
6-10% of a POS coin is enough 'real estate' to create many 'things' that can't be created with 0.0003%
I know I have not explained anything, but it is some thoughts.
If you are serious about your business idea, you should consider joining the NEM ecosystem board, where people are discussing NEM business ideas. So far, none of them have required a significant stake of NEM.