As subject goes, is Bitcoin the maximum version?
Is it still possible to develop it?
or
Can we still expect better coin than Bitcoin?
I do not think, bitcoins needs any more development.
We peoples love bitcoins as they are and hence we should continue using them as they are.
Are we really expecting any change in the blockchain technology?
It would be good if the technology gets more advanced but not much changes are required in bitcoins.
By this logic, scenario of thousands of unconfirmed transactions (which happened in late 2017) would happen again and honestly, Bitcoin was barely functional at that time. There needs to be changes and development because new challenges will emerge and Bitcoin will need to offer solutions. Just look at SegWit and Lightning Network. And solutions that will increase anonymity of bitcoin transactions are being developed at the moment.