Luxury meal and room costs 15 Crimson Coins. The price includes food (high-quality meals), a room for the night, and possibly some additional amenities.
Where as wages are:
Lower Class: 3 Crescent Coins/week
Middle Class: 6 Crescent Coins/week
Higher Class: 9 Crescent Coins/week
A standard inn costs 5 Crimson coins:
Room for the night: 1 Crimson Coins.
Morning meal: 2 Crimson Coin.
Evening meal: 2 Crimson Coins.
Does this seem reasonable?
As someone who has dealt a bit more with currencies, information and otherwise; maybe not to the level of some people in this place but it has mattered a lot in my main worldbuilding.
You need to give different answers for those numbers you use.
Lets keep that ratio you said, 25:1 and 50:1, that means the full ratio is about 1250:50:1
I'm going to rename them just so they are easier to tell apart for a minute, sorry but it's slightly less brainpower to dedicate on coins that share the same first 2-3 letters of 'C, E & R' with an i&L mix
So 1250 Red, 50 Moon, 1 Sky. Equalling Crimson, Crescent and Celestial.
You state Moon are for 'everyday transactions' and Sky coins are for 'high status' stuff.
Lets ask a few establishing questions for you to reply to:
What is the lowest amount of money you would need to live on for a day, you claim a 'lower class' wage is 3 moon, or 75 red coins, so that assumes about 10 red coins/day for wages.
Ignoring how the wages wouldn't be linear 3/6/9 and more likely to be multiplicative, such as 5/25/125
That means at the base price, market stalls need to sell their ingredients at a few Red coins per item, a loaf of bread or some fruit, marking up 2-4 Red coins on average.
This is before labour costs and everything else, including that there would be mark-up due to it being cooked for them and the inn being a place you would assume people go when they don't have a house of their own. The price would be 6-10 red coins at minimum for a meal.
Now the main issue; which I assume is a typo; hence me renaming the coins for this example, is the fact you state a luxury room is 15 crimson/red coins per day, but it only costs 2-4 crimson/red coins for an apple or loaf of bread.
Otherwise that implies a person of lower class, can save up 105 red coins, when they earn 75 a week, to earn a luxury room.
Luxury should be targeting high earners, and require months of wages for lower members of society to spend a few days in the place.
Private rooms would be significantly more expensive, please keep in mind, including the fact 'fantasy inns' and the like are incorrect, that people can usually pay to sleep in the main room near the fireplace or hearth for a cheaper cost and the like. But even then they already cater to middle class with merchants, travellers and the like.
Lower class would be communal housing and other things including sleeping outside to save money, budgets should be tighter and not a nice room to themselves with a meal prepped for them.
Lets go for the other direction then.
To mobilise a group of random farmers, or whoever you have arbitrarily decided as 'lower class', that would be 3 moon coins per week for wages.
Now if you were to want say, 100 people to hire for a month, 4 weeks; that would be 1200 moon coins, equalling 24 sky coins
Considering a population of a city ends up in the thousands, if not tens of thousands, you wouldn't even be able to mobilise the lower class unless you had hundreds of sky coins in value to spend.
Military tends to get paid a higher wage to encourage them to do their jobs, in a medium city of 10,000 you could expect around 30-100 people hired, so at minimum you might be paying 30 sky coins, per month to maintain even basic public order, especially since you would need even more to maintain public order and any sort of main richer trade location or merchant republic would have higher prices due to the investment in the job itself; and then upkeep, the buildings and equipment, their meals which would generally be provided and whatever along with any staff you need to maintain the location.
Even a small noble would have at least 30 staff for wherever they live, with large noble houses hitting 100-300 people in their staff team.
If I had to recommend a fix, try spacing things out based on the value you would understand the society you are using to have.
Place 'ingredient price' such as fruit, bread and other food items, as low as a few small coins.
Place low grade clothing to be at least 20-30x the value of that food.
Place metal goods in general, as the start of your second currency, where copper/bronze and maybe iron goods might appear, enough that a small household could save up for a few weeks and get a single copper knife for general use but not easily buy a large amount of materials
Same goes for all household cooking items, pots and the like, these are one time buys usually that will last years, hence their markup usually being on the edge of what lower class can afford. Farm tools and the like also factor in here.
After placing basic metal goods at the bottom of the second tier of currency, markup any metal weapons and gear another 20x the price of any pots you might sell, military level goods would require a higher prices for regulation. This means by your current values, a single sword might cost 60 moon/crescent coins, or 1500 red/crimson coins
Once you have an idea of these goods, ask yourself how much a merchant can carry. For pots, pans and other metalware for lower class, merchants, the 'middle class' who are bulk buying, need to be capable of buying at least 10-20 of an item at those prices, if the merchant doesn't have a budget enough to buy even half their stock, there is something potentially wrong with your balancing of currencies.
And after that, ask yourself how much it would cost to hire a full group of 100-300 lower class people, giving them food and tools to say; dig a road for 2 weeks between your newly built manor and the city, keeping in mind extra costs for material logistics, carts and otherwise. With prices now scaling into sky/celestial coins, needing 30 coins for a project for 100 workers for 2 weeks plus food, tools and the like; you either need something above that, or to redistribute the value of the coins slightly for any project larger than a small road.
Still, as a reader, having two currency things with such similar names would confuse the heck out of me 
