I have been thinking about this recently, what Will happen if Bitcoin network gets too big? Will there be any issues with it's speed or fees
Most probably the fees will increase because its demand increases as well. But I think its speed will be quite compromised, which is very common for any larger network, so the bitcoin team will definitely work on it.
But let’s face the reality, bitcoin network is actually bound to level up and get massive in the long run. And this could pave way closer to global adoption, which is bitcoin’s goal and the whole bitcoin community target ever since.
We would also have a better LN to use in said future, so..