Based on your submission, you are concluding that because BTG is facing this, the next is surely going to be bitcoin. On a light note bitcoin gold is the second most valuable fork after bitcoin cash which means there is still enough time before it will get to bitcoin itself so chill.

Now, you need to consider how bitcoin came about and other forks with the exception of BCH which has done quite well in which we know its due to some prominent factors behind it, others are free money which a lot of people are willing to dump. The reason for its fall to that point now and not earlier is because holders are thinking that the price would increase to the high point like BCH and when the market start crashing, its gradually turning to a myth that's the reason for the dump. But the down turn now is surely not permanent.