Adding the Bitcoin symbol to the keyboard will scream "ADOPTION". The question is where to put the key? I would suggest they replace the $ with the bitcoin symbol... just kidding. However, it gotta go somewhere, what do you think?
I know you are kidding because we have already an Emoji available here in forum so there is no need for adding Bitcoin symbol in keyboard and besides i love pronouncing the whole Word BITCOIN outside this forum than the Logo/symbol so i don't really care about that adding or now.
let the system put symbol of bitcoin in time , but this will surely happen in the future when total adoption comes our ways.