Spectre has a projected annual inflation rate of 5 percent. It looks to me, this inflation is a bit on the heavy side when it come to cryptocurrency. Other than that, it's like Proof-of-Stake (PoS) Monero-like crypto with privacy features. How does staking work, at the same time maintaining the privacy of the users, is beyond me.

All in all, I don't see Monero being threatened here.