I'd settle for figuring out how to send an email to a previous point in time. I'd like to email myself in 2009. Something about buying a bunch of ASIC's and mining something for a long-term hold.

No need to mine it. Just buy in bulk at $1 and hold.

Bitcoin market cap is still pretty small as far as global financial markets go. I'd have doubts at being able to extract serious amount of money from it. I'd bet you can find something much more conventional to invest in that'll produce big gains that can be extracted easily.

You know in that timeline you'd spend a fortune on ASIC mining hardware and the market would tank because Murphy's Law could not possibly resist showing up and ruining the party.

You mean like this:

https://en.wikipedia.org/wiki/Wheeler%E2%80%93Feynman_absorb...

Would it even be possible to measure this?

Exactly. It'd be so downright bizarre and difficult to pin down that we'd probably go nuts thinking we were all delusional to imagine such a thing could exist in the first place.

Then when we have proof we'd be even more confused.

They just need to reverse polarity on the LHC!