Comment by 153791098c

Nothing changes except for the missing block reward. At the moment mining a block on BTC will net you about $100K (block reward + fees). If BTC wants to keep the same (relative) security as it has now while having no block reward, the transaction fees have to cover the $100K. With the current 7tps (at most) limit that will have to amount to about $24 per transaction when the blocks are 100% full all the time. If people aren't willing to pay that transaction fee or use an alternative (cheaper) cryptocurrency, the security of the BTC chain will plummet.