On the other hand Nicehash profit calculator, if used correctly, would give you an idea about the "trend" of that ASIC. $5000 last month and $52 now. Means that last month was making $166 per day. Now, after just 30 days, it's making $52 per day. The trend is clear. In about a month it will make about $6/$12 per day and in about 2 months it will make about $2/$4-5 per day so, chances to ROI are almost zero. The problem with a machine like that, that can only mine an ALGO with very few coins, is that those "poor" few coins will get "hammered" by miners, the exchange value will plump completely and there is no exit strategy.
In about 3 months from now the X3 will make not more than $1/$3 per day (not considering the electricity costs)

There are other asics that can ROI in some/several months. Look at the L3+. People consider it a miner for Litecoin. But this is totally untrue. You can mine any Scrypt coin and if you are good you can still make good profit out of it. There will be always new SCrypt coins.

This miner, the X3, and the other cryptonight Asics, can ONLY mine Cryptonight. But all of the coins ran away from CN (forked) and there will be NO new coins using this algo in the future. They will all use the new Cryptonight forked algo.

So this ASIC cryptonight miner and the other cryptnight miners are REAL garbage. I am NOT against ASICs. But honestly, this time, it's a total FAIL. I am sorry for the people who bought it and received it these days. They will NEVER ROI. And also the price for this miner on Ebay will plump. No one is gonna buy it.

At this point my suggestion is to try to get rid of this miner for as much money as possible and limit the loss. In about 1 month this miner will be worth not more than $200 on ebay.