Bitcoin & ETH analyst at TopMonks Blockchain Studio (https://blockchain.topmonks.com) explains how Bitcoin will likely overcome the diminishing block subsidy. By 2019-Q3, transaction fees make up only about 3% of the total Bitcoin market cap. By the end of his article, Dan aims to estimate likely median median transaction fees. By looking at the past data, I think we already have a simple heuristic at hand to find out how much the Bitcoin miners should be paid as the subsidy diminishes.