How much impact would mining rewards and halving have on the market then, when about 99% have already been mined and the remaining yet to be mined would not affect the market much.
If miners are 99% depending on transaction fee and 1% depending on mining reward, that means miners are depending on transaction fee already. At start, miniers got 50BTC for mining a block, which increases bitcoin supply in circulation. Increase supply will have reduction price effect on price. After every halving, the mining reward is reducing every 210000 blocks. The reducing mining reward will result to increasing bitcoin price because if the supply is not reduced, the price couldn't be as high as it is. Because of this, people fomo during halving as the supplying is getting reduced and buy during the time. Probably this may become a fomo event in the future as it is happening now, people may take halving as a period of buying. If the supply is reduced, with more adoption and fiat devaluation, definitely there would be more increase in bitcoin price.
with fiat currencies increasingly devalued and with the Bitcoin being more and more acquired and used by the population, by the time the last Bitcoin is mined, whoever has a fraction of Bitcoin will be rich.
I can not doubt this at all, fiat will always depreciate, an advantage for higher bitcoin price. Taking gold as an example, gold reached $678 in 1980, gold reached all-time-high ($2075) in 2020. According to officialdata.org, the buying power of gold at $678 in 1980 has the same buying power of $2142 in 2020. Although people are buying gold but yet getting supplied by gold miners, the valuation in gold is more in fiat valuation. The amount of chocolate gold can purchase in 1980 is still almost the same amount the same amount of gold would purchase in 2022, but getting value in fiat depreciation. This also would help in bitcoin price valuation, definitely.