So does anyone really know how long Bitcoin will be viable if mining is completely not worth the money or time because of the exponential increasing in difficulty??
The market auto-adjusts itself.
If mining isn't profitable anymore someone will stop mining, difficulty will decrease, and mining will be profitable again.
Quite easy and brilliant, I'd say.
agree, but we have to wait some time
by the way, i often exchange Bitcoin on BTC, on which platform you guys exchange ?