Money can be "lost", and "created". In fact, it regularly is by commercial banks; this is the cornerstone of the modern economy. The bank of England wrote a pretty accessible document on money being created and destroyed [1]. For a slightly deeper dive (but equally accessible) check out "Can’t We Just Print More Money?" by Rupal Patel, et al. [2] which describes the different kinds of money.
The 2014 doc was a pretty wild read for me when it came out - it changed my perspective quite a bit.