^ Try withdrawing about 10% of your total gain or however much on a daily basis. With the fluxuation of coin price, and the fall of BTC price, every other coin is dropping like a brick with it which means your portfolio value falls with it.
Solid idea. I smell a feature request for Cat 1.3

A Feature like "Re-Use 90% Of your Gains?" (Where 90 is a variable value)
Or maybe is better 2 variables :
Re-Use 90% Of your BTC Gains (When is a Ping-Pong Buy-Sell)
Re-Use 90% Of your XXX Gains (When is a Ping-Pong Sell-Buy)