Just think that if some other altcoin has the potential to take place of bitcoins, like people are talking about Monero to take its place because of its privacy and security, what would happen to bitcoins? Is there any altcoin currently which can do this? And if yes, what would be the effect on bitcoins?
most of the coins that claim this will soon die because it is mostly hype. you can see what has happened to ethereum with all its bugs and hacks. and in case of monero although it has some nice features for privacy but it always had these features and it doesn't look like they changed anything about its fate all this time, and only it began rising when a small news and then bigger hype started spreading.
i would think about this question only if there is a valid competition for bitcoin and there is none yet!
It is still the same. Trying to recreate bitcoin is really hard for them. So they thought of something which could look like it but holes are always there. A lot of alts came and some are already lost. There is still one that is left standing even when it fell. It is bitcoin.