Actually (according to Trump’s wife at the time, Ivana) he kept a copy of Hitler’s speeches, not Mein Kampf, by the bed. In an interview, Trump remembers someone giving him a copy of Mein Kampf, but the donor says that it was actually a book of speeches. (Business Insider)

Mein Kampf would have been a better choice, because at least it would have indicated that he was interested in ideology.

The book of speeches (My New Order), on the other hand, shows that Trump is only concerned about manipulating people (some of whom seem to have commented on your post).