Why is btrash doing so well ?

Probably because of the upcoming fork.
https://news.bitcoin.com/upgrade-time-bitcoin-cash-plans-a-32-mb-hard-fork/This week the Bitcoin ABC developers officially announced the much anticipated Bitcoin Cash network hard fork on May 15.
Proponents are looking forward to a 32 MB block size increase and op-code additions that could bring ethereum-like characteristics to the BCH network.