i think in the future bitcoin will be forgotten like other coin.
I am afraid you may be right, that
if Bitcoin developers sleep longer and don't develop (research and develop?) way for an on-chain scaling (not off-chain, like LN), Bitcoin will be forgotten ...
Now there are more and more projects based on the blockchain of the 4th generation. The speed of transactions on these platforms is 10 times higher than the speed of Bitcoin transactions. Of course, Bitcoin remains the leading blockchain, but if no steps are made towards modernization, then the leading role of Bitcoin may take another currency.