My opinion is that the leaders will be the coin, the developers of which will be able to solve all the triad of the existing problems – scalability, decentralization and security (vulnerability). So far it turns out that one of these problems inevitably affects the other two.
Oh and of course a disproportionately high energy consumption method for the confirmation of the consensus POW must give way to the more acceptable.
English translated using Google translator so - don't blame me :)