Which of the leading cryptocurrencies will become more scalable and efficient in the long term?
Will it be Bitcoin with its Layer Two solutions such as the Lightning Network and Sidechains?
Or Bitcoin Cash with its on-chain scaling solutions by increasing the block size limit?
I would like to know your thoughts about this.

As for me, I will choose the use of bitcoin because bitcoin is easier to do. That means, it will be more efficient because when doing transactions with bitcoin we can have easier transactions but if bitcoin Cash, people still have to convert them back to bitcoin then transact it once again. That is my opinion.