With coinbase outputs getting cut in half all of the time, we'll eventually reach a point where mining is completely subsidized by fees. It looks like this could result in miners losing their hats and a 51% attack.
Peter Todd points to tail emission (constant emission of bitcoin, for example constant 1BTC block reward forever, instead of a geometric distribution with halvenings) as a possible solution. It provides constant security for the network and the actual effect on inflation (the inflation as a % of total supply) decreases asymptotically to zero as time goes on. It's already used in monero and dogecoin, and they haven't collapsed yet.
What do you think, anon?
Will bitcoiners ever move beyond the 21 gorrillion coins cap?
If not, will bitcoin implode in like 10 years due to selfish mining attacks?