The AM PE ratio is not a good comparison at the moment. At it's peak it was about 30% yield. But now all the people who bought in are just holding out of desperation rather than expecting a decent return.
AM shareholders are holding because of high expectations on return from gen3 hardware.
About yield, you're right - it was about 30%. That was I used in my post above.
I'd like to see the math on that, i'm pretty sure that if you take into account the btc price change and bought in at IPO of .1, the P/E is alot higher than 30%. the prices peaked at 4.5 to 5 BTC per share.