Everyone loves to talk about the 21 million cap, but we almost never talk about Bitcoin's dirty little secret: the year 2140.
'Dirty little secret' - if its a secret how did you find out about it? Just because
it is t talked about regularly doesnt mean we are not aware of it
The network wont implode, explode or vaporise when the last Bitcoin is mined.
Transaction fees will become the main revenue for miners of which there are
~100 years to figure it out.
Nodes are also an integral part of the network security!