How would the future look? 5000 transactions every second at 0.00001 Bitcoin perhaps?
5k tps is quite high. According to
this page, Visa itself process 2k tps.
Plus, bitcoins can be traded without the blockchain. You may think of the blockchain as a "clearing house".
Nobody can predict how much transaction fees will be paying in the future. We can assume it will be lower than CCs.
Also whats to stop everyone just paying 0 and thus destroying the entire network?
Miners are free not to include a transaction in the block they mine. The transaction fee is a kind of tip to the miner that includes your transaction.