Pigzbe is a tool that helps families manage pocket money and the fun learning experience for children that comes from this. It is intended to be used with very small sums of money and is NOT intended to be used as a savings product.
Having said this if you are worried about volatility one way to protect yourself is to buy Wollo in small amounts regularly over time - weekly, monthly or bi-monthly- based on the amount you intend to use in the app.
In the financial world, this technique is known as “dollar cost averaging” and is a tried-and-tested method to smooth the impact of price movements by drip-feeding purchases over a longer period of time. By using this technique, over the long-term, the impact of any price changes should be minimised.
You can find out more information on dollar cost averaging here https://en.wikipedia.org/wiki/Dollar_cost_averaging