I believe we need something major to change things up a bit. I know that the biggest trouble right now is the transaction speed and cost, so my vote goes to finding a way to make transactions in bitcoin a lot faster and cheaper, if we can do that the price of bitcoin can go up a lot more, and I mean literally a lot more, such as 40 thousand or more dollars because that is something that keeps bitcoin movement rigid right now.

However it doesn't have to be something like this, it could be anything close to that and I understand that it would definitely make something more logical happen in the future, I can't think of anything like that, only example is the fee's but anything that makes it go up a lot more would work, we just need some changes.