I can tell you that price of BTX is very stable and I am glad it is this fast. As a fork of bitcoin, I think it has been doing very well.
It is not a fork of bitcoin. It is an independent blockchain that started fresh with its own genesis block where there was an airdrop of coins to bitcoin holders; but in no way it is a fork. A fork splits from the original blockchain. BTX in no way did that.
Don't elude yourself. It's a fork. It even states that in About window.
BitCore BTX version v0.15.0.2-gba8ed3a93be (32-bit)
Copyright (C) 2011-2018 The Bitcoin Core developers
Copyright (C) 2011-2018 The Litecoin Core developers
Copyright (C) 2011-2018 The Bitcore Core developers
Based on Bitcoin Core, Litecoin Core developers work. If it's not a fork, it would be based on something completely else or written from the scratch. It's NOT.