Is Bitcoin actually ready to go mainstream?
No , it is not yet ready before the price stabilized which cant be happening in a short time because not everyone like to hold of a currency that its value is not stable. Not all people take the risk of volatility.
If it is not ready then the question is when will it be ready?
It will be ready after the value of bitcoin stabilized or atleast until it gets popular enough, expect some companies to announce that they accept bitcoin