A miner that successfully mines a block collects all the transaction fees for transactions in the block. They are high right now because many people want to sen

A miner that successfully mines a block collects all the transaction fees for transactions in the block. They are high right now because many people want to send transactions, but blocks are capped at 1 MB, limiting the number of transactions that can fit into one block. Blocks are produced approximately once every ten minutes, so a transaction that contains a fee that’s too low will constantly get passed over in favor of higher-fee transactions.