How does the bitcoin security tied on miners reward, this is not so, even after the entire bitcoin has been mined, miners will solely depend on the amount charged on transaction fees which I even see it's more better by then for them than now, whereby they may not have to mine bitcoin again and still make their earnings upon every block confirmation reward.
My take was that if transaction fees are too small (now they comprise only around 1% of miners’ revenue) and there is no more block reward (by 2140 or so), the miners will not be motivated enough (in terms of money) to validate the blocks. In this case, the network security will decrease alongside the amount of miners. So, I opened up the discussion to talk about possible outcomes for the network
if this happens.