When trying to dump my BCash for more BTC, I am faced with several problems. One of them, is needing to send a transaction for each public key in order to maintain privacy.

The other is, how slow BCash is. Bittrex is taking 20 confirmations for deposits, which means it will take me forever to dump the entirity of my wallet.

I have seen other exchanges, that don't require 20 confirmations. Why does Bitttrex require 20 confirmations, while others like Bitfinex seem to take less? Is it safe to take less than 20 confirmations when depositing? Please help.