Would have been exquisite timing pp, and as you say, from 25 to...

Would have been exquisite timing pp, and as you say, from 25 to 34 cents you'd be sitting on a 36% profit - fantastic! And if it keeps on going, even better. However, if that jump was caused by Block's results, the market digests the big differences between Block and ZIP, then the Aus RBA lifts rates and warns it will do it again next month, then ZIPs price could slide. Down to 29 cents and 36% slides back to 19% and you're still carrying the risk.

Alternatively, if you had entered at 25 cents, exited at 34 cents you would have booked and cemented that 36%. Re enter with a short position at 34 cents, it goes to 29 cents, get out and again book your profit, add another 14% and your gross profit is 50% from only 5 days max, less your costs of trade, spread and interest.

See the difference? You can sit on a gain and potentially lose it, or book it and build on it going the other way.That is available to anybody with or without a ZIP holding and there are many derivatives to use even if you want to trade on a market platform without using a broker, or if you're morally conflicted about taking a long or short position.