That's good information. And this makes sense in a situation...

That's good information. And this makes sense in a situation where you buy/sell/exchange on an Coin Exchange (like Coinspot or BTCMarkets).

How about a scenario where you buy coins on an exchange and then use a service like shapeshift or changelly into another coin?

In the first scenario there is a CGT event when you sell your coin back to fiat. In the second scenario, this coin is never sold to fiat (as far as I know), so it would be very hard to determine exact capital gains? Not to mention the fact that shapeshift is more anonymous than using an exchange...