The problem is I don't think XRP has a use case. Currently its intended use case is highly speculative, yet unproven. Banks are still uninterested in the token XRP six years after Ripple was incorporated. Banks are not clueless.
The biggest competitors for LTC and BCH? Stellar and RaiBlocks. These coins were architected for payments that provide low / zero fees, high throughput, and fast confirmation. They provide these solutions today, and there are no hidden tricks like subsidizing transactions.
Nano is looking to be for cheap, simple payments. It's not trying to be maximally decentralized like Bitcoin. It's arguable that, even if only data centers ran historical nodes, Nano would be less centralized than BTC, whose hash power is controlled by only a few pools.
One of the worst PR moves #zcash ever made was to publicly discount projects with similar goals, repeatedly, when their technology was too early to practically provide their core value prop (privacy). It gives the impression that they are in this for the wrong reasons.
Monero is considered the gold standard among private coins largely because it started with domain experts in privacy who took all the right steps in the formation and design choices for a private coin.
IOTA, made by the same geniuses who rolled their own cryptography without peer review, harassed the cryptographers who found the vulnerability, and tried to cover it all up with increasingly absurd excuses.
Bitcoin Cash is like the dysfunctional, bizarro version of Bitcoin. - A known fraud is the figurehead - The intended form of protocol governance is by miners - Their primary form of outreach is propaganda / brand confusion - Their origin story is literally a conspiracy theory
Bitcoin Gold has some of the most irresponsible/incompetent developers in all of crypto. They delegated the security entirely to 3rd party wallets, some of which stole millions and others with a history of selective scamming. They never fixed this and have no plans to.
I'm really curious to see how the "utility tokens" turn out. I suspect they'll be pennies on the dollar. The tokens of CVC, for example, are gift cards for using the service. I don't think there will be enough business generated to justify $223M market cap.
In regards to privacy, XMR, ZEC and GRIN are the only good options. Zcoin protocol may be ok in narrow circumstances, but some privacy isn't much better than no privacy in general. The common theme is the use of zero knowledge cryptography.
0x, one of the most popular dex protocols, has collected only $2000 in lifetime transaction fees despite having a market cap of $160M. The token is also not necessary for the protocol to function and will likely be forked out by major relayers.