Real Madrid has an experienced management, an experienced coach like Ancelotti. And this is why they have been able to form a stable and strong squad. Both Ancelotti and the Madrid management are visionaries. They have built this squad for a long time. And there is strong bonding between the players in the squad. But this is possible due to experienced coaches and management. At the same time, Madrid has a lot of money. They are also able to pay high wages to the players. Madrid have everything a club needs to thrive. This is why we see Real Madrid's dominance in the Champions League every year.
That's the thing about Real Madrid, they are becoming very scary because they are doing everything absolutely perfect. They have a great president, they have a great management, they have a great staff team, they have great players, hell they even made a great stadium.
Considering all of this, there is a potential that they could do the treble for five years in a row and wouldn't even be shocking, not saying they will but the fact is that they could and would be realistic is the scary part. Who could beat Real in this period? I mean look at them, they are better than every team and they could keep on winning, and while they do spend a good chunk of money on all of this, they are making it back with the new stadium and all the reward prizes.