I honestly rather buy low cap coins/tokens with good fundamentals. I seem them having better risk/reward ratio. And we have seen what has happened to every ico/ieo/ido etc that has anything to do with mining. Either they scam people or don't know what they are doing. And list of stuff that can go wrong with mining is just too long for me.
I too remember my brother working for some mining based companies as a translator, he translated the materials but never got paid from any of them. IIRC, one of them was Ice Rock Mining. But yeah, I recently invested in Grayscale Bitcoin Trust and I believe they hold enough BTC with them to circulate as well as make enough money to pay their users as well as increase the value of their stocks. Other than that, I didn't invest in any crypto stocks yet and I believe I won't even be doing that because as you said, I'm also a daytrader and I can only invest a very small part in some institution's hands to grow my money for me, and the remaining part is traded by myself.