I was wondering on this, we have seen reports of big mining farm popping up once in awhile. We all know they made the difficulty jump like mad. But will this affect or shorten BTC initial end generating date ?
A continuously increasing amount of global hashpower will shorten the amount of time it will take to generate all the bitcoins.
If the hash power ever decreases, then the amount of time it will take to generate all the bitcoins will increase.