Not sure mining chip increases will be possible, I think the only way is for mainstream adoption and transfer of existing fiat money to Bitcoin.
It's worth remembering that the Winklevoss Twins mentioned the potential Bitcoin to be worth $40,000 each, this would mean that;
- 2 terrahash mining
- currently mining $10 a day at $380 Bitcoins
- current mining value is $1000 per day if each Bitcoin ends up being worth $40,000 each.
Some people are saying Bitcoin, if it absorbs alot of global currency may become worth in excess of $500,000.
It's certainly interesting to see what happens, but nothing explains why all of a sudden 70 Petahash of mining has suddently just dropped off the radar..
http://www.coinwarz.com/cryptocurrency/coins/bitcoinIm still concerned there is a new coin launched using the SHA256 protocol that only a handful of people know about.