I still think overmining is teh problem. yet I am expecting teh invention of a new technology that can mine 100,000 BTC a day.
But teh question is how many world wide would belive in it after all the BTCs have been harvested and daily transactions are pice of cake ?
Do you understand how difficulty works. There is no invention that can generate more than 7,200 BTC daily for the entire planet. In about a year that will be 3,600 BTC daily.