I am by no way an expert, but I do read and research a lot. Today, any coin can remove Bitcoin from the top. Bitcoin has become a dinosaur, there is no governance and no consensus on how to fix it deficiencies. That has created a bunch Bitcoin forks. Those forks attempt to "fix" Bitcoin, but unfortunately they share Bitcoins dinosaur's DNA and don't provide much innovation to the coin. The forks have become the easy way for dev teams to become rich quickly. Litecoin had a change, but their founder sucks at marketing the coin. He is terrible explaining the benefits of of his own coin. Ethereum still has a chance, getting it adopted for example by Amazon will definitely take it to the moon. Do some research and you will find that Amazon recently bought a bunch of domain names that are crypto/Ethereum related.
Going back to XPR, I do agree with the OP about the potential of this coin for becoming huge, maybe #1. It is an innovative coin with a clear purpose. It is not designed for a few to get rich quickly and anonymously. The coin is well accepted by financial institutions like AMEX and Santander. It also has the backing of companies like Microsoft. I do see the potential for it to become huge. I was fortunate to sell BTC before the bubble exploded and bought XPR. I am buying more XPR and SMART this weekend. IMHO, they are two well managed coins with developer teams that deliver on their promises, with innovative features, and a bright future.