liminal sites in a state of transition from physical decline to renewal

1. The following context is about parkour and graffiti. ?Does the green sentence actually mean the in-between spaces that are destroyed and are requiring renewal?

2. Does the red sentence mean "capitalism’s transciency and capitalism's inherent wish to fall down"? Why should capitalism wish to fall down?

Context:

Whilst the sheer diversity of practices makes it difficult and, indeed, undesirable to conflate them into anything as confining as a generic form, there are perhaps certain common characteristics that can be identified and that begin to make a discussion possible. One of them is doubtless around the question of temporality, specifically ephemerality. Not only do many – perhaps all – of these incursions into the cityscape possess a ‘temporary aspect’ in their realisation – implying a form of movement that steers them towards performance – but frequently they seek out temporary spaces as their settings: liminal sites in a state of transition from physical decline to renewal– though the latter is by no means given – or whose complex sociocultural make-up renders them subject to continual fluctuations. As outlined in Chapter 1, Benjamin pointed to the revelatory nature of urban sites lingering on the brink of extinction, seeing in the decline of the nineteenth-century arcade, for instance, signs of capitalism’s transciency and inherent ‘will to decay’. Such in-between states hold the promise of certain potencies for the artist...