BTC is a stepping stone to a global currency. AT this point in the mining game you either need a dedicated serious ASIC mining rig running
1,500 Gh/s and free power.
An ideal setup would be a cheap apartment with power included running multiple rigs 24-7 at around 6,000 Gh/s.
Now the problem is recouping the cost of the gear, as more blocks BTC are discovered they become ever increasingly more difficult to find.
Personally I work in a mining pool and just do it for the fun aspect, will never get rich.
Sofa King Tactical!