Hi Piotr, you again managed to ask a question that just asks for answering ;-). Since I would probably write a whole book to answer all the possible subjects, I will concentrate on only one of them.

Will AI be able to do daytrading for us? Better than currently humans do?

Here my contest entry:
The big banks already understood that machines are much more efficient when it comes to trading shares or currencies. They have been employing the best graduates in mathematics from the most renown universities to build up algorithms for trading bots. They use them to do high frequency trading (several operations within seconds) and more importantly for the usage of derivative products like options or futures. At the big banks there is hardly any trade made by a human being... Well that is not completely true since they still trade the shares and bonds of their customers by humans and ask for commissions for doing so.

So while the normal people have to pay the banks for buying and selling shares without the knowledge collected by the algorithms, the banks have much better options.

AI and blockchain might level the playground

If it becomes possible to program bots according to the best algorithms and that this knowledge becomes available to everybody as open source code, then it will be possible that all players on the markets play with the same guns.

How long will it take?

A couple of years ago, I would never have thought it to be possible. But I think now that we are just a couple of steps away from it. I have friends who already run their own bots on Bitrex or Kraken. For the moment, it is quite difficult to run them because there are too many settings and the chances of losing are as big as the chances of winning.

Wouldn't it be nice if we could all profit from the best technology based on AI and blockchain, to have an automated income on the share markets?