Nothing to fear or worry about the future of bitcoin. All that's happening with bitcoin is positive and till date haven't shown any signs of destruction. If it is towards the end, now the entire technology advancement should have come to an end without new usage implementation.
I agree on you on the part that bitcoin was turning into better now as We see on its price continue increasing but it still scary especially bitcoin now was not dumping the act that its prive was volatile so there are times that it will fall. I think its normal to worry on it because we didnt know what will happen next on bitcoin.