Stay away from Coinbank. The owner has a long track record of running scams and ponzi's.
You don't want your coins in a place owned by such individual.
Source: https://factordaily.com/amit-bhardwaj-gbminers-bitcoin-ponzi-scheme/
I've been warning people against GainBitcoin for a long time. Just a few months ago the supplier for mining equipment cancelled their contract with GBMiners for exactly this reason: it's a ponzi.
I would think twice about using a Coinbank wallet. Just use common sense!