If bitcoin price is very high in future, there won't be any problem for miners because they still earn same amount of money (in fiat).
Also, ASIC or mining device will be more efficient than now in future & electricity price could be lower if scientist can find better way to produce electricity for lower price.
So, i think there won't be any problem if those condition are fulfilled.
Do you mean the fees amount in BTC will not change? But if some guy bought 0.01BTC for 100$ ("bitcoin price is very high in future") and he have to pay 0.0001BTC (one $) per each transaction? What if he wants to buy some good that costs 1-2$? 50% fee it is very bad. If the whole world will use Bitcoin miners will do all that I wrote.Also, ASIC or mining device will be more efficient than now in future & electricity price could be lower if scientist can find better way to produce electricity for lower price.
So, i think there won't be any problem if those condition are fulfilled.
I mean if bitcoin price is very high, miners can earn bitcoin which worth a lot in fiat so they don't have to increase bitcoin fee, in fact they can reduce bitcoin fee drastically.
I just forget to write that in previous post, that's all.
Yes, miners can reduce fee, but even reduced fee will worth a lot in fiat so it will be disadvantageously to buy cheap goods.