If you're planning to mutate, crossover, and select expression trees, you'll need a survival function (~cost function) in order to reinforce; RL.
Blockchains cost immutable data storage with data integrity protections by the byte.
Smart contracts cost CPU usage with costed opcodes. eWASM (Ethereum WebAssembly) has costed opcodes for redundantly-executed smart contracts (that execute on n nodes of a shard) https://ewasm.readthedocs.io/en/mkdocs/determining_wasm_gas_...
AFAIU, while there are DLTs that cost CPU, RAM, and Data storage between points in spacetime, none yet incentivize energy efficiency by varying costs depending upon whether the instructions execute on a FPGA, ASIC, CPU, GPU, TPU, or QPU?
To be 200% green - to put a 200% green footer with search-discoverable RDFa on your site - I think you need PPAs and all directly sourced clean energy.
(Energy efficiency is very relevant to ML/AI/AGI, because while it may be the case that the dumb universal function approximator will eventually find a better solution, "just leave it on all night/month/K12+postdoc" in parallel is a very expensive proposition with no apparent oracle; and then to ethically filter solutions still costs at least one human)