Fusion energy and new generation of batteries will be coming in the near future and I think that will solve 99% of the problems that we have in our modern age.
Bitcoin will of course be the top money once the governments see reason and decide to give up on their centuries-old pyramid scheme. And they will have to give up, since by making something decentralized and uncontrollable by third parties, we take their options away from them. We force their corrupt little selves to acknowledge the future.
You're optimistic about Bitcoin for good cause. Its decentralization and lack of third-party control reduce government power. If properly integrated into the global economy, it might be a stable currency. However, this is a major change that will provide substantial problems and oppositions. The path ahead is lengthy and unpredictable