I don't think investing in utilities as a way to anticipate demand because of mining or bitcoin use, BUT utility stocks are pretty good on their own because they generally pay really good dividends.

One of my favorites is American Electric Power (AEP), which currently is paying around 3.8% as a dividend.  They provide power to parts of the midwest if I'm not mistaken.  Eversource (ES) is another one.  They're out of Texas but provide power to parts of New England, and their yield is around 3.5%.  Even if you didn't benefit from anything related to bitcoin's power consumption you'd still be earning a decent dividend income.  The downside is that you won't see much in terms of capital gains (probably).

You said you know about Con Ed, and that's a great stock as well.  One of the biggest and best utility plays there is.