My fantasy is having $1m for each of these, in order of importance:

• Theseus, for I want C off my kernel (and because it's the most exciting project written in Rust at the moment)
• rustc_codegen_cranelift, for I want C++ off my tooling
• Mustang / Eyra, for I want C off my dependencies
• Pijul, for I want a better VCS than Git
• Wild linker, for I want C off my tooling