as usual u all assume that monero will perform as advertised. even if it does, dozen of other more capable and popular coin are implementing anonymity too.
so, i still think that monero could be irrelevant in few years if there is no improvement.
1) Monero's chance of working as advertised is at least as great / higher than most other alts, because the cryptography behind it has had much more review and academic study than most. A lot of intelligent people have studied the code and the cryptography and believe that it works as advertised.
2) What are these 'dozen' of more capable and popular coins? There only exist a handful of coins that are more popular than Monero, by any reasonable measure of community size, or by market cap. Similarly, there are very very few dev teams that you could make a case are 'more capable' than Monero's (if any).
3) Duh, Monero could be irrelevant in a few years without improvement. Same with every crypto in existence, including bitcoin. It has an active dev team making progress on many fronts. Monero hard forked recently to incorporate many improvements into the codebase.
4) Please stop trolling us.