Drastically increase the block size and at the same time shorten up the block time as well — in exchange, drastically sacrificing security and decentralization. It's what Bitcoin forks like LTC/BCH/BSV/etc did.
Or use second layer solutions, such as lightning network.
On lightning network you can make a lot of transaction for fees smaller than a satoshi and just settle the final balance on the blockchain.
But I believe this discussion about transactions per second is not as important as it looks like, especially for newbies.
Most newcomers see those discussions about scalability and think that this is the main point of bitcoin and its a great weakness, but it is not.
Even when you compare to the banking system (where international transactions may sometimes takes 2-3 business days and costs more than a dozen of dollars), bitcoin is doing fine.
We make a transaction for less than 0.5 USD which will be confirmed in 10-20 minutes, to anywhere in the world. Without asking for any third-party authorization and a reasonable anonymity if you want. I think this really amazing.
