Having problems that make BTC intrinsically (by design) not viable long term is an opportunity?

You see problems. I see opportunity for someone to make money by solving those problems.
1.) Make ASICs that utilize less power.
2.) Develop software that can compress the ever increasing blockchain to make it more manageable.
3.) Figure out how to mitigate risk related to the centralization of mining.
But some of the problems are intrinsic to how BTC and the Blockchain work (for example the reliance on Proof-of-Work which needs the system to constantly and forever pay the miners with either big inflation or higher transaction fees, among many others), and for some of them we don't even have an idea on how to solve them yet...
Why adopt NOW something that is CURRENTLY broken/doesn't really have a plan for the long term?