I already think bitcoin is mainstream from my perspective, I'm no expert but when major retailers and outlets accept bitcoin, and I can buy a pint of beer from the local pub with bitcoin, in my eyes... that is mainstream.
I am also curious if cloud mining is viable, I've always kept away but if truth sticks can be shown on this subject for clarity, that'd be awesome for us newbies.
I agree completely. I wasn't aware that you could make purchases at a retailer using BTC already. That's one of the reasons I'm here, to learn and earn and share.
There is a new offering from openledger that is a card like you describe, it's called ocash