I think it's entirely possible. AI have already shown their ability to learn in complex situations such as mastering games like chess and poker, trading in a sense isn't too far different from such things. The difficulty is that it will not be able to understand things from a qualitative point of view, for example if there is negative news about bitcoin, how would the AI quantify that and include it in to their decisions?
Sure, I feel you! However, I would not compare the complex situation of trading to the examples you have given. Looking at the real situation of the market bro, I am sure even AI at some point may just want to give up.
You already said it in the last sentence, and I am kind of wondering how the algorithm is going to scoop all patterns and analysis of the market to just make accurate decisions all the time. I guess time will tell as it is too late to start judging but I would not want to put too much hope on that.