In 15 years the subsidy will drop below 1 BTC to 0.78125 BTC per block.
If the exchange rate is $300,000 per bitcoin, then even if the miner collects no transaction fees at all, that's still $234,375 per block. Is that ""negligible"?
Exactly. So far the growth of Bitcoin relative to fiat has always offset the loss of declining block rewards - and then some. Assuming that Bitcoin is still alive and kicking in 15 years this trend is likely to continue. Worst case the Bitcoin fiat price can't keep up with the block reward halving, in which case less electricity will be spent on mining. But as long as Bitcoin exists, mining will always find a profitable optimum of more or less hashpower. That's the beauty of it.
On a related note bitcoin is NOT limited to being called bitcoin. Just a few tiny tweaks and it could be called
bitloin.
Duuude. So what you're saying is that Bitcoin is NOT
grammatically limited to the name Bitcoin? :O