The only problem with these cryptos is they aren't that profitable. One of the sites we work with started accepting dozens of crypto-currencies. Sounds great on the surface.
The problem is there is no volume.
Low liquidity cryptos have tons of users. Lots of users who, in theory, have few ways to use/profit from their coins. One would think this would lead to many of them willing to deposit and gamble with them. In practice, these dozens of cryptos, when combined as one metric, at the vendor I speak of account for a low single digit percentage of all crypto deposits and withdrawals. Bitcoin is top dog and it isn't even close.
So while it may be easy to rank for, you could also be creating a nice website that might only have the possibility of making a couple hundred dollars a month, at best. I suppose to some people that is worth it, but in our estimation, that wouldn't even cover the content creation, much less hosting, time spent on updating,
SEO work etc. No room for profits IMHO.