Dan Held, the co-founder of cryptocurrency accounting solution Interchange, foresees an organic tradeoff taking place between the Coinbase transactions (i.e. block rewards) that miners receive and the transaction fees they receive from users. Held described the tradeoff in a Medium blog post analysing the security of the Bitcoin network. It is estimated that transaction fees will increase to 50% of the compensation miners receive by 2030 and numerous data sources are used to corroborate the viewpoints put forward in the post.
Source: Medium