I had previously doubted that Bitcoin would be replaced by another currency. But my mind has changed. Because I see there are many other cryptocurrencies that the developers are trying hard to solve the problems in cryptocurrencies. What about bitcoin? We don't know who are the developers and no effort is being made to develop it.
If you don't try hard, your rivals will win. Bitcoin's rivals will win too.
I think that bitcoin cannot be replaced by anther cryptocurrency. You said that our developers didn't try theor best to solve our problems here that is wrong because we all know that all the creators here are giving their best to make bitcoin stronger.