That is a very complex question but I think I have a note saved when I asked myself the same thing, let me edit and paste it below: 
If we consider the modern definition, usury refers to the charging of interest rates that are deemed either illegal (as determined by governments influenced by monetary interests) or immoral (as defined by academia and legal frameworks also underpinned by those same financial interests) — [the double irony being that these definitions are set by entities funded by usury itself].

Aristotle's ancient definition, which I find more apt, describes usury as wealth which begets wealth. In my view, this is essentially wealth multiplication through time manipulation- once an agreement is initiated, it guarantees either payment or failure. 3000+ years of this surely has made hegemonic centralized empires. 

Now, addressing your question on how Bitcoin equates to usury: Bitcoin can be seen as dynamically deflationary, countering a century of inflation. Similarly, as it evolves today onwards, Bitcoin is transitioning from a non-usurious instrument into a tool of usury, influenced by the descendants of those who controlled the 1919 gold fix. These forces now manifest in the strongest and most expansive non-violent, indestructible entity—the 2020 Coalition for Inclusive Capitalism. This group aims to impose a form of control akin to an IMF Structural Adjustment Program (look up what these SAPs did to Nigeria) but applied to every transaction, interaction, and even minute daily activities by the year 2121, envisioning a comprehensive and pervasive economic regulation.

Of course the last part is bullshit and extremely speculative but I hope the other stuff makes sense. Bitcoin is wealth, but it is also an idea of code at the end of the day. Even if it doesn’t change, if all else change in accordance to it, it can be said to have forced into change. Right now the 2020 CIC only has $30 trillion, once countries gradually join it, an evolved and name-changed 2121 Global Inclusive Finance Initiative is just a fancy way of saying 2121 Bitcoin Fix. 

All I know is,100 years from now, there won’t be a shadow of a doubt that Bitcoin is usury the way things are presently playing out. Hope this jargon helps clarify stuff, feel free to ask questions