There doesn't seem to be a great deal of new capital entering the system...
Bitcoins are still being mined, and some fraction of those are sold to pay for electricity. There's enough new capital coming in every day to pay for the electricity.
I can agree with your first two assertions, but I don't see market evidence of the last one. If substantial amounts of capital were being brought in, there would be a number of indicators of that (most notably that the market would be trending up rather than down).