Can Bitcoin realistically become a common method for daily transactions?
I strongly believe it can but not yet and not too soon, because bitcoin has not matured up to that age and there are lots of people who are still not comfortable with the idea of accepting Bitcoin in their business as a means of payment. I think that transactions with Bitcoin will excel in the area of across the border payments because once people understand the ease of transactions they would prefer it to the traditional methods of sending money from one country to another. All this will take some time.
What level of maturity does Bitcoin need to reach to be recognized and become a payment method? What criteria must an asset meet to become a means of everyday payment?
Satoshi created it to be a currency, not an investment and that means it meets the criteria to be a payment method. But the problem is that the world does not want to use for its original purpose but instead uses it as an investment tool to make profits . It's been 16 years , no one wants to use it as a payment method and everyone is very comfortable being invested in it, so there's no reason why they would change their mind.
Bitcoin cannot and will never become a common method for daily transactions, we should accept that fact because it is what we have chosen.